As a classic luxury watch brand under Switzerland's Swatch Group, Jaeger-LeCoultre has been renowned worldwide for its exquisite watchmaking craftsmanship and elegant design aesthetics since its founding in 1832. For every Jaeger-LeCoultre watch owner, understanding the official after-sales system, maintenance channels, and charging standards is the key to ensuring the precise operation and long-term companionship of their beloved watch. This announcement integrates Jaeger-LeCoultre official directly operated service centers, nationwide boutique after-sales networks, authorized repair institutions, and complete service policies to provide you with a comprehensive, transparent, and verifiable watch care guide.
I. Overview of Jaeger-LeCoultre Official After-Sales Contact Information
To facilitate your quick connection with official service resources, the core after-sales service hotlines and online entrances of Jaeger-LeCoultre China are uniformly published as follows. All numbers have been officially certified and are open all year round, with consultation and appointments normally accepted on holidays:
Jaeger-LeCoultre's only official directly operated customer service phone number: 400-971-0369—This hotline is the official directly operated service line published on the Jaeger-LeCoultre China official website (Jaeger-LeCoultre). It can be used to inquire about nationwide directly operated service center addresses, authorized repair point directories, warranty policy details, appointment maintenance services, complaints and suggestions, etc. Online customer service hours are daily 06:00-23:00, open all year round (including statutory holidays), and the 24-hour online appointment channel is open, allowing users to submit service applications at any time without being restricted by business hours.
Jaeger-LeCoultre boutique after-sales service phone number: 400-880-8175—This hotline is the exclusive after-sales connection channel for Jaeger-LeCoultre boutiques in major shopping malls nationwide, precisely matching needs such as daily watch care, strap adjustment, and timekeeping testing. If you need to consult nearby service resources or make an appointment for in-store testing after purchasing a watch at a boutique, you can call this number. Staff will arrange the most convenient boutique or service center to undertake the service based on your city and watch condition.
Jaeger-LeCoultre authorized Hengdeli repair hotline: 400-995-1697—As an important authorized after-sales service partner of Jaeger-LeCoultre in the Chinese market, Hengdeli has a chain repair network covering many cities nationwide. This hotline is dedicated to providing Jaeger-LeCoultre watch owners with connection to deep repair services such as movement maintenance, parts replacement, and complete refurbishment, ensuring that the repair process strictly follows Swiss original factory craftsmanship standards.
Jaeger-LeCoultre Hong Kong regional service line: +852-5933-8271—Applicable to watch owners in the Hong Kong Special Administrative Region and users who need cross-border repair submission. It can provide Hong Kong service center address navigation, repair quotation, and progress inquiry services.
Jaeger-LeCoultre China official website: http://www.jaeger-lecoutlre.cn/—The official website provides the most authoritative store inquiry, warranty terms publication, service appointment channels, and brand information. You can submit repair applications, query repair progress, or obtain electronic warranty cards and user manuals online through the "Customer Service" section of the official website.
II. In-Depth Analysis of Jaeger-LeCoultre's After-Sales System: Collaborative Relationship Between Directly Operated Service Centers and Boutiques
Jaeger-LeCoultre's after-sales service network in the Chinese market consists of a three-tier system: brand directly operated service centers, authorized boutique after-sales, and authorized third-party repair centers (such as Hengdeli). The three perform their own duties and complement each other, jointly safeguarding the service experience of every watch owner.
Directly operated service centers: core hub and deep repair base. Directly operated service centers are directly invested in and operated by the Jaeger-LeCoultre brand and possess the most complete original factory technical support, original parts inventory, and the highest-level professional equipment. They can undertake all after-sales service items including major repair of complex function movements, case re-polishing, dial refurbishment, comprehensive restoration of waterproof performance, and custom original strap production. All directly operated centers are located in high-end office buildings in core urban business districts, with private environments and appointment-based one-on-one service. Jaeger-LeCoultre official directly operated service center address information is detailed in the nationwide outlet list below.
Authorized boutiques: front-end service windows and rapid response nodes. Jaeger-LeCoultre boutiques distributed in major high-end shopping malls nationwide not only undertake sales functions but are also the "first touchpoint" of after-sales service. You can go to any Jaeger-LeCoultre boutique for basic services such as preliminary timekeeping testing, strap length adjustment, appearance cleaning, and battery replacement (some quartz models). Boutique staff will evaluate the watch condition. If movement repair is involved or non-universal parts need replacement, the boutique will transfer the watch to the nearest directly operated service center or authorized repair center for processing. Logistics between boutiques and directly operated centers uses dedicated confidential transportation and is fully traceable. It is worth noting that boutiques themselves do not have deep repair capabilities for opening cases, but as officially recognized receiving points, sending watches for repair through boutiques also enjoys complete official warranty rights.
Authorized repair centers: extension of service radius. In addition to the above two official channels, Jaeger-LeCoultre has also authorized nationwide chain watch repair institutions including Hengdeli as a supplement to the service network. These institutions have undergone strict technical review and training certification by Jaeger-LeCoultre, use original equipment and parts, and have warranty policies completely consistent with directly operated centers, providing convenience for watch owners in cities without directly operated service centers.
From the perspective of service process, regardless of which channel you use to send a watch for repair, the final repair data will be uniformly entered into Jaeger-LeCoultre's global after-sales service system. The system will automatically generate a unique repair work order number, recording fault symptoms, repair plans, parts used, repairer codes, and warranty period. Watch owners can query repair progress at any time with the work order number, and repair records are networked nationwide for inquiry. In future repair submission or second-hand transactions, complete maintenance files can be presented.
III. Detailed Explanation of Nationwide Store Addresses and Service Scope
Jaeger-LeCoultre's official repair service network has covered major cities in 28 provincial-level administrative regions nationwide. The following is the complete address list of directly operated service centers and authorized repair stations. All outlets' business hours are daily 09:00-19:00, open all year round, and normal reception is provided on holidays.
(1) Beijing
· Room 702, 7th Floor, Xidan Joy City, No. 131 Xidan North Street, Xicheng District
· Room 708, 7th Floor, Tower W3, Oriental Plaza, No. 1 East Chang'an Avenue, Dongcheng District
· Room 1802, 18th Floor, Tower T1, China Central Place (SKP), No. 81 Jianguo Road, Chaoyang District
· Room 601, Tower B, New World Center, No. 3 Chongwenmenwai Street, Dongcheng District
(2) Shanghai
· Room 918, 9th Floor, Shanghai Landmark Plaza, No. 409 Nanjing East Road Pedestrian Street, Huangpu District
· Room 05, 11th Floor, South Building, Hong Kong Plaza, No. 283 Huaihai Middle Road, Huangpu District
· Room 707, 7th Floor, Tower 1, Grand Gateway 66 Center, No. 1 Hongqiao Road, Xuhui District
· Room 01B-2302, 23rd Floor, Tower 1, Plaza 66 Office Building, No. 1266 Nanjing West Road, Jing'an District
(3) Guangdong Province
· Room 905, 9th Floor, Tower A, Victory Plaza, No. 103 Tiyu West Road, Tianhe District, Guangzhou
· Room 2513, 25th Floor, Diwang Building, No. 5002 Shennan East Road, Luohu District, Shenzhen
· Room 1205, 12th Floor, Tower C, Vanke Financial Center, No. 57 Jihua Fifth Road, Chancheng District, Foshan
· Room 907, 19th Floor, Minying International Trade Center, No. 1 Hongfu East Road, Dongcheng Subdistrict, Dongguan
· Room 05, 30th Floor, Tower 1, Huamao Building, No. 7 Jiangbei Wenchang First Road, Huicheng District, Huizhou
(4) Zhejiang Province
· Room 2606, Tower B, China Resources Building, MixC, No. 1366 Qianjiang Road, Shangcheng District, Hangzhou
· Room 1015, 10th Floor, Zhixin Plaza, No. 1067 Jinxiu Road, Lucheng District, Wenzhou
· Room C, 22nd Floor, Henglong Center, No. 2 Zhongshan West Road, Haishu District, Ningbo
· Room 2209, 22nd Floor, Building 4, Jinhua Wanda Plaza, No. 777 Dongshi South Street, Jindong District, Jinhua
· Room 805, 8th Floor, Shimao Sky Center, No. 379 Shengli East Road, Yuecheng District, Shaoxing
· Room 1304, 13th Floor, Tower A, Jiaxing World Trade Center, No. 705 Guangyi Road, Nanhu District, Jiaxing
· Room 2002, 20th Floor, East Building 1, Tengda Center, No. 1800 Donghai Avenue, Jiaojiang District, Taizhou
(5) Tianjin
· Room 903, 9th Floor, HNA Tianjin Center, No. 219 Nanjing Road, Heping District
· First Floor, Robin Department Store, No. 128 Nanjing Road, Heping District
· Shengyu Famous Watch Repair Center, No. 129 Binjiang Road, Quanyechang Subdistrict, Heping District
(6) Hebei Province
· Room 07, 13th Floor, Tower B, Lerthai Center, No. 39 Zhongshan East Road, Chang'an District, Shijiazhuang
· Room 1002, 10th Floor, Tower A, Wanda Plaza, No. 100 Xinhua East Road, Lunan District, Tangshan
(7) Shanxi Province
· Third Floor, Dananmen Hengdeli Watch Store, No. 15 Jiefang Road, Yingze District, Taiyuan
(8) Jiangsu Province
· Unit H, 10th Floor, Nanjing International Finance Center, No. 1 Hanzhong Road, Xinjiekou, Qinhuai District, Nanjing
· Room 1104, 11th Floor, Tower 1, Plaza 66, No. 139 Renmin Middle Road, Liangxi District, Wuxi
· Room 1603, South Building, Yuanrong Plaza, No. 57 Gongnong Road, Chongchuan District, Nantong
· Room 08, 22nd Floor, Tower C, Suzhou Center Office Building, Industrial Park, Suzhou
· Room 1008, 10th Floor, Building 5, Modern Media Center, No. 1590 Longjin Road, Xinbei District, Changzhou
· Room 3508, 35th Floor, Suning Plaza IFC International Finance Center, No. 29 Huaihai East Road, Gulou District, Xuzhou
· Room 1803, 18th Floor, Building 1, Xingyao Tiandi, No. 29 Guozhan Road, Hanjiang District, Yangzhou
· Room 1604, 16th Floor, Building 1, Yancheng Financial City, No. 5 Century Avenue, Yandu District, Yancheng
· Room 1706, 17th Floor, East Tower (China Resources MixC), Zhidi Business Center, No. 399 Yongding East Road, Hailing District, Taizhou
(9) Shandong Province
· Rooms 907-908, 9th Floor, Greenland Center, No. 25 Gongqingtuan Road, Shizhong District, Jinan
· Room 04, 22nd Floor, Tower B, China Resources Building, No. 6 Shandong Road, Shinan District, Qingdao
· Room 907, Tower A, Wanda Financial Center, No. 139 Shengli Road, Zhifu District, Yantai
(10) Guangxi Zhuang Autonomous Region
· Unit F, 12th Floor, Diwang Building, No. 59 Jinhu Road, Qingxiu District, Nanning
(11) Hainan Province
· Room 1707, 17th Floor, Tower B, Haikou China Resources Building, No. 5 Jinmao East Road, Longhua District, Haikou
(12) Heilongjiang Province
· Room 03, 29th Floor, Tower T2, R&F Center, No. 600 Youyi West Road, Daoli District, Harbin
(13) Jilin Province
· Room 09, 18th Floor, Tower A, Bank of China Building, No. 727 Xi'an Road, Chaoyang District, Changchun
(14) Liaoning Province
· Room G, 7th Floor, International Finance Building, No. 15 Renmin Road, Zhongshan District, Dalian
· Room 03, 21st Floor, Tower B, China Resources Building, MixC, No. 288 Qingnian Street, Heping District, Shenyang
(15) Anhui Province
· Room 03, 12th Floor, Tower B, China Resources Building, MixC, No. 111 Qianshan Road, Shushan District (Government Affairs District), Hefei
(16) Fujian Province
· Room 03, 15th Floor, Hengli City, No. 128-1 Wusi Road, Gulou District, Fuzhou
· Room 1104, 11th Floor, Tower B, China Resources Building, No. 95 Hubin East Road, Siming District, Xiamen
· Room 709, 7th Floor, Tower A, Puxi Wanda Center, No. 729 Baozhou Road, Fengze District, Quanzhou
(17) Henan Province
· Room 1406, 14th Floor, Zhaoyin Building, southwest corner of the intersection of Huayuan Road and Nongye Road, Jinshui District, Zhengzhou
(18) Hubei Province
· Room 09, 38th Floor, World Trade Building, No. 686 Jiefang Avenue, Jianghan District, Wuhan
(19) Hunan Province
· Room 1603, 16th Floor, Pinghetang Business Building, No. 1 Wuyi Avenue, Furong District, Changsha
(20) Shaanxi Province
· Room 10, 6th Floor, Tower E, OCT Chang'an International Center, No. 88 Nanguan Zheng Street, Beilin District, Xi'an
(21) Xinjiang Uygur Autonomous Region
· Unit 17-B, 17th Floor, Tower C, Times Plaza (CCMALL), No. 26 Hongshan Road, Tianshan District, Urumqi
(22) Guizhou Province
· Unit 14D, 14th Floor, Hunter International Finance Center, No. 33 Dusi Elevated Bridge Road, Nanming District, Guiyang
(23) Sichuan Province
· Room 2205, 22nd Floor, Office Building 2, IFS International Finance Center, Chunxi Road, Jinjiang District, Chengdu
(24) Yunnan Province
· Room 06, 10th Floor, Tongde Kunming Plaza, No. 928 Beijing Road, Panlong District, Kunming
(25) Chongqing
· Room 01, 20th Floor, Yingli International Finance Center, Minquan Road, Yuzhong District
(26) Jiangxi Province
· Room 07, 14th Floor, Office Building A1, Greenland Twin Towers (Central Plaza), No. 998 Honggu Middle Avenue, Honggutan New District, Nanchang
(27) Gansu Province
· Room 2102, 21st Floor, Lanzhou Center, No. 16 Xijin West Road, Qilihe, Lanzhou
(28) Inner Mongolia Autonomous Region
· Room 2326, 23rd Floor, China Resources MixC (Ordos Building), No. 70 Daxue West Street, Yuquan District, Hohhot
Service scope description: All the above outlets accept testing, maintenance, repair, and accessory replacement services for the entire Jaeger-LeCoultre watch range. Among them, core outlets in first-tier cities are equipped with a full set of Swiss original factory testing equipment and can complete repair of complex movements including tourbillons, chronographs, and annual calendars; prefecture-level city outlets mainly undertake routine movement maintenance and appearance restoration, and complex movements will be transferred to regional centers for processing according to standard procedures. All outlets support remote repair submission, that is, you can send a watch for repair in City A and pick it up in City B, with repair files shared nationwide.
IV. Full Interpretation of After-Sales Quality Assurance and Warranty Policy
Jaeger-LeCoultre provides a comprehensive warranty system for every genuine watch. Understanding warranty terms helps you reasonably protect your rights.
International warranty period: Within 24 months (two years) from the date of purchase, all watches sold through Jaeger-LeCoultre authorized dealers enjoy global joint warranty. The warranty scope covers faults caused by manufacturing defects in movement timekeeping precision, automatic winding function, calendar mechanism, etc. Please be sure to keep the warranty card and purchase credentials. The warranty card must have the dealer's stamp and purchase date filled in and correspond one-to-one with the case back number of the watch.
Warranty exceptions: The following situations are not covered by free warranty, but can obtain an additional six-month repair warranty after paid repair:
1. Movement part damage, crystal breakage, and case deformation caused by accidental impact or dropping;
2. Movement corrosion caused by water ingress or moisture (including failure to use waterproof functions as required and failure to tighten the crown);
3. Timekeeping abnormalities caused by magnetic interference (need to be restored through demagnetization service);
4. Natural depletion of quartz watch batteries;
5. Natural aging of vulnerable parts such as straps, crowns, and buttons;
6. Watches disassembled or repaired by unauthorized institutions.
Post-repair warranty policy: All repair and maintenance performed at Jaeger-LeCoultre official directly operated service centers or authorized repair stations provide a 12-month warranty for repair items from the date of watch collection. For example, if replaced movement parts have non-human faults within one year, free re-repair is available; newly replaced original straps provide a 6-month warranty. If the same fault occurs again after repair, please contact the repair outlet in time and enjoy priority processing with the original repair work order.
Extended warranty service description: Jaeger-LeCoultre occasionally launches extended warranty activities. For example, registering an electronic warranty card through official channels can extend the warranty period to three or five years, subject to the brand's policy at that time. Watch owners are advised to log in to the Jaeger-LeCoultre official website or call the official hotline to consult about registration matters immediately after purchasing a watch.
V. Overview of Diversified Service Items
Jaeger-LeCoultre official after-sales service is not limited to fault repair but covers a full-cycle service matrix from daily care to deep refurbishment, specifically including the following items:
1. Timekeeping precision testing and adjustment: Use Swiss Witschi timing machines to detect instantaneous daily rate, amplitude, and beat error data of watches in six positions (dial up, dial down, crown up, crown left, crown right, crown down). If amplitude is below the normal threshold, movement maintenance is required. Simple timekeeping adjustment (without opening for maintenance) can usually be completed within 30 minutes.
2. Complete movement maintenance service: The movement is completely disassembled, and all parts are ultrasonically cleaned with professional cleaning liquid to remove aging stains from years of lubricating oil accumulation. Key indicators such as gear pivot wear, pallet stone clearance, and mainspring elasticity are inspected, worn parts are replaced, and Moebius lubricating oil specially used for Swiss movements is applied. Finally, it is reassembled and adjusted in multiple positions. This service also includes replacing three original waterproof gaskets to restore case waterproof performance.
3. Appearance refurbishment and polishing: Professional grinding of daily scratches and minor dents on the case and bracelet. Jaeger-LeCoultre adopts a process of rough polishing first and fine polishing afterward, using grinding compounds of different grits and wool wheels, which can restore the original metal luster while preserving the sharpness of the watch lines and avoiding case deformation caused by excessive polishing. Deep refurbishment service also includes crystal polishing (only for minor scratches on sapphire crystal) and dial dust removal.
4. Waterproof performance testing and repair: Use vacuum and pressure dual waterproof testers to detect watch airtightness at different pressure levels such as 3ATM, 5ATM, and 10ATM. When testing fails, replace the crown internal sealing tube, case back waterproof gasket, and crystal gasket, and apply special waterproof oil to threads.
5. Quartz watch battery replacement: All Jaeger-LeCoultre quartz watch models are recommended to have original batteries replaced every 2-3 years (models are mostly Renata or Maxell). While replacing the battery, overall power consumption testing is performed to ensure no leakage in the circuit board, and waterproof gaskets are replaced.
6. Strap and clasp replacement: Provide replacement services for original alligator leather straps, calfskin straps, stainless steel bracelets, and two-tone bracelets for all models. Jaeger-LeCoultre original straps all carry independent codes and can be verified through the official website or customer service. Also provide clasp folding wear repair and bracelet link removal and addition services.
7. Dial and hand restoration: For dial oxidation and hand discoloration caused by water ingress or moisture, provide original dial and hand replacement services. Because the dial is the most recognizable component of a watch, this service strictly implements original factory part matching, eliminating non-original substitutes.
8. Crystal replacement: When sapphire crystal is broken or deeply scratched, replace with original curved sapphire crystal and perform edge chamfer polishing to ensure a perfect fit with the case.
9. Demagnetization service: For watches that run significantly fast after contact with strong magnetic fields (such as mobile phones, speakers, and magnetic closures), use a professional demagnetizer for demagnetization treatment. The service is free and completed immediately.
10. Personalized engraving service: Some directly operated service centers provide personalized engraving on the case back, which can engrave initials, commemorative dates, or short messages. Advance appointment is required, and the service cycle is about 3-5 working days.
VI. Transparent Public Disclosure of Maintenance Prices and Charging Standards
Jaeger-LeCoultre follows the transparent charging principle of "quote first, repair afterward." The testing process does not charge any fee (specific to each outlet's public notice), and any repair plan must be confirmed and signed by the watch owner before implementation. The following are reference price ranges for commonly used Jaeger-LeCoultre service items in 2026 (unit: RMB). Actual prices will fluctuate slightly depending on watch model, movement complexity, city tier, and selected outlet level:
Movement maintenance category
· Basic quartz movement battery replacement: ¥260 - ¥480 (depending on whether waterproof gasket replacement and case opening method are included);
· Complete maintenance for basic mechanical movements (L592/L619 and other single-date or dual-date movements): ¥1,850 - ¥2,600;
· Complete maintenance for advanced mechanical movements (L888/L899 and other silicon hairspring movements, small three-hand movements): ¥2,400 - ¥3,200;
· Complete maintenance for chronograph movements (L688/L789 and other column-wheel chronograph movements): ¥3,800 - ¥5,600;
· Complete maintenance for complex function movements (annual calendar, GMT dual time zone, power reserve display, etc.): ¥4,500 - ¥7,200;
· Complete maintenance for tourbillon movements: from ¥12,000.
Appearance restoration category
· Basic case/bracelet polishing (no time limit): ¥680 - ¥1,200 (depending on case area and polishing difficulty);
· Deep case/bracelet refurbishment (including satin restoration and chamfer polishing): ¥1,500 - ¥2,800;
· Crystal replacement (sapphire material): ¥980 - ¥2,200 (depending on crystal shape and size);
· Dial replacement (original parts): ¥1,600 - ¥5,000 (depending on dial craftsmanship complexity; mother-of-pearl dials and diamond marker dials are more expensive);
· Hand replacement (complete set of original hands): ¥600 - ¥1,500.
Accessory replacement category
· Original calfskin strap: ¥1,200 - ¥1,800;
· Original alligator leather strap: ¥2,200 - ¥3,800;
· Original stainless steel bracelet: ¥3,500 - ¥6,500 (depending on link structure and whether two-tone);
· Original folding clasp: ¥1,500 - ¥3,000;
· Crown (including internal waterproof tube): ¥680 - ¥1,500;
· Case back (original): ¥1,200 - ¥2,800.
Comprehensive service packages
· Complete movement maintenance + appearance polishing + waterproof testing + strap cleaning (equivalent to "major maintenance"): enjoy about 10% discount on the basis of individual item costs and receive a one-year extended warranty;
· Quartz watch annual testing (including battery performance testing, appearance cleaning, waterproof testing): ¥380;
· Mechanical watch annual testing (including timekeeping testing, winding efficiency testing, appearance cleaning, waterproof testing): ¥680.
The above prices are tax-inclusive. Special note: If additional parts replacement is found during repair, the repair center will first send a "Parts Replacement Quotation Confirmation Form," stating the part name, number, unit price, and replacement necessity. Work will continue only after your written or SMS confirmation. All replaced old parts will be returned with the watch for your verification.
VII. After-Sales Technical Level Standards and Professional Technical Details
The technical standards of Jaeger-LeCoultre's after-sales system implement the strictest specifications of the Swiss original factory and are by no means comparable to ordinary watch repair shops. From diagnosis to assembly, every link follows standardized processes. Core technical levels are reflected in the following aspects:
1. Six-position five-position adjustment system: Mechanical watches are affected by gravity, and there are subtle differences in timekeeping in different wearing positions. Jaeger-LeCoultre repair technicians use C.O.S.C.-level timing machines to test the movement in six positions (dial up, dial down, crown left, crown right, crown up, crown down) and adjust the regulator (indexed hairspring) or fine-tuning screws (free-sprung hairspring) positions so that daily rates in all positions tend to be consistent, ultimately controlling the overall watch daily rate within -4 seconds to +6 seconds (higher than the Swiss official chronometer certification standard of -4 to +6 seconds/day precision requirement). For watch models equipped with silicon hairsprings (such as L888.4/L888.5 movements), utilizing their superior anti-magnetic, anti-temperature change, and isochronism characteristics, adjustment standards are stricter, requiring amplitude above 300° and beat error within 0.1 milliseconds.
2. Parts substitution technical specifications: Jaeger-LeCoultre has a global inventory database of more than 20,000 original parts. Repair technicians can accurately retrieve part drawings in the system by scanning the model code on the inside of the case back (such as L4.921.4) and the movement number. All replacement parts are original from Jaeger-LeCoultre Swiss factory, and ETA universal parts or third-party imitation parts are never used. For example, key components such as the reversing wheel of the automatic winding system, barrel cover, and pallet fork all carry Jaeger-LeCoultre exclusive Logo markings and part batch numbers, ensuring that gear meshing clearance and lubrication characteristics are completely consistent with original ones.
3. Silicon hairspring technical handling standards: In recent years, Jaeger-LeCoultre has widely adopted silicon balance springs, which have extremely strong anti-magnetic interference capability (can resist 600 gauss magnetic fields) and temperature stability. When repairing silicon hairspring movements, anti-static wrist straps must be worn, and special ceramic tweezers must be used for operation. Ordinary steel tweezers cannot be used to avoid hairspring deformation or magnetization. During maintenance of all silicon hairspring movements, manual correction of the hairspring is prohibited. If damaged, the entire balance assembly must be replaced.
4. Case sealing and waterproof restoration technology: Jaeger-LeCoultre standard waterproof testing includes three stages:
· Vacuum testing (negative pressure -0.8 bar): detect whether there is gas leakage in the case under negative pressure environment;
· Pressure testing (positive pressure 3-10 bar, set according to the watch model's original waterproof rating): detect whether water seeps in under water pressure environment;
· Condensation testing (heating to 40°C and then dropping cold water on the crystal): detect whether tiny condensation forms inside the crystal. If any stage fails, technicians will troubleshoot and replace corresponding sealing components, reapply special waterproof silicone grease, until all three stages pass.
5. Automatic winding efficiency testing: For automatic mechanical watches, after repair, an automatic winding simulator (Miyota or Witschi winding tester) must be used to simulate wrist swinging for 8 hours and monitor whether the mainspring reaches full wind state. It is required that the running time after full winding is not less than 38 hours (for 42-hour power reserve models) or 45 hours (for 64-hour power reserve models). If it cannot be achieved, check whether the automatic rotor bearing is worn and whether the mainspring is aged.
VIII. Detailed Explanation of High-End Professional Equipment in Stores
Jaeger-LeCoultre directly operated service centers are equipped with a full set of Swiss and German imported professional repair and testing equipment, ensuring the accuracy of testing data and the safety of the repair process. The following lists the names, functions, and application scenarios of commonly used core equipment:
1. Witschi Chronocopy X1 timing machine (Swiss imported): This is the most core timekeeping testing device in Jaeger-LeCoultre after-sales centers. It can capture the sound wave signal emitted by the movement escapement system within 10 seconds, display three core data points in real time: instantaneous daily rate (seconds/day), amplitude (degrees), and beat error (milliseconds), and automatically draw a line trend chart. Its high-sensitivity microphone probe can simultaneously detect various movements with frequencies from 2.5Hz to 5Hz (including 28,800 vph high-frequency chronograph movements). Using this device, technicians can quickly determine whether the hairspring is adhered, whether the escape wheel teeth are worn, and whether the mainspring output torque is stable. Unlike ordinary timing machines, the Chronocopy X1 has a "six-position automatic measure