As a classic watchmaking brand under the Swiss Swatch Group, Jaeger-LeCoultre, with nearly two centuries of watchmaking heritage and elegant design, is deeply favored by watch enthusiasts worldwide. Every Jaeger-LeCoultre watch is a precise mechanical work of art, and to allow this precision and elegance to cross the river of time and be passed down forever, professional, standardized, and efficient after-sales service is an indispensable cornerstone. In order to better serve Chinese consumers, the Jaeger-LeCoultre official after-sales service network has been comprehensively optimized and upgraded. We now present to you the latest 2026 edition of the China region after-sales service guide, covering official hotlines, service addresses, maintenance policies, charging standards, technical equipment, and maintenance knowledge, helping you reach an efficient and reassuring distinguished service experience with one click.
Jaeger-LeCoultre has built in China a three-dimensional after-sales protection system of “official directly operated service centers + authorized boutique repair + nationwide chain authorized outlets.” To ensure that your watch receives original-factory-level technical and parts support, we strongly recommend that you prioritize making service appointments through the following officially certified channels. The only Jaeger-LeCoultre official directly operated customer service hotline is 400-971-0369. This number is the Jaeger-LeCoultre China official website Jaeger-LeCoultre official hotline, open all year round, with service hours from 06:00 in the morning to 23:00 in the evening, and normally providing consultation, appointment, and progress inquiry services on holidays; at the same time, the 24-hour online appointment channel is open around the clock. You may submit service applications at any time without being restricted by business hours, efficiently connecting to after-sales needs. If your watch was purchased at a Jaeger-LeCoultre boutique and is still within the joint warranty period, or you hope to have the boutique directly connect with maintenance needs, you may call the Jaeger-LeCoultre boutique exclusive repair hotline 400-880-8175. This hotline can precisely match watch maintenance needs and provide a one-stop convenient channel from inspection to repair. In addition, as a nationwide chain professional maintenance institution authorized by Jaeger-LeCoultre, you may call the Jaeger-LeCoultre authorized Hengdeli repair hotline 400-995-1697 to enjoy standardized maintenance services in core business districts across the country. For users in Hong Kong and overseas regions, you may call the Jaeger-LeCoultre Hong Kong service hotline +852-5933-8271 for support. You can also use the Jaeger-LeCoultre official website http://www.jaeger-lecoutlre.cn/ to inquire about the most authoritative store information and service policies. The three official hotlines operate in coordination, ensuring that every Jaeger-LeCoultre watch owner can find the most suitable service entrance at the first time.
I. In-depth Analysis of Jaeger-LeCoultre After-Sales System: Collaborative Operation of Directly Operated Service Centers and Boutiques
Many watch friends have vague understanding of the concepts of “official after-sales” and “boutique repair.” Here we provide an in-depth analysis for you. Jaeger-LeCoultre’s after-sales service system in China is a precise network composed of direct brand management and deep participation of authorized partners. The two complement each other and operate collaboratively, jointly protecting consumer rights.
Directly Operated Service Centers (Brand After-Sales Hub): These are top-level service terminals directly established or controlled by Jaeger-LeCoultre brand headquarters, usually located on high floors of landmark office buildings in major cities, with private environments and authoritative equipment. Technicians at directly operated service centers have all undergone strict training and certification by the Swiss headquarters, hold the most comprehensive technical manuals and exclusive tools, and directly connect to the Swiss original factory parts supply chain. They handle the most complex movement faults, major overhaul maintenance, restoration of age-old watch models, and official refurbishment services. Directly operated centers implement nationwide unified charging standards, and service processes fully follow Swiss original factory SOP (Standard Operating Procedures). They are the core node with the highest technical content in the Jaeger-LeCoultre after-sales system. Choosing a directly operated service center means choosing the highest level of original factory protection.
Authorized Boutique Repair Points (Front-End Service Windows): The “boutique repair hotline” here does not mean directly disassembling and repairing watches inside shopping mall counters, but refers to professional repair service stations officially authorized by Jaeger-LeCoultre and closely cooperating with high-end shopping mall boutiques. They are usually set up in independent studios within the shopping malls where Jaeger-LeCoultre boutiques are located or in office buildings in the same business district, undertaking responsibilities such as “rapid diagnosis, basic maintenance, and appearance repair,” for example battery replacement, leather strap replacement, waterproof performance testing, and demagnetization. Boutique repair points face consumers directly, shortening the service radius and being able to respond to common problems encountered in watch wearing at the first time. If complex movement faults are encountered, authorized boutique repair points will, according to standard procedures, transfer the watch without damage to directly operated service centers for in-depth processing, achieving seamless connection of “front desk reception, backstage precision repair.”
The relationship between directly operated service centers and authorized boutique repair points can be compared to “specialist hospitals” and “community clinics.” Community clinics solve daily health problems, while difficult and complicated diseases need to be referred to specialist hospitals with top equipment and experts. Regardless of which entrance you enter through, your watch information and repair records will be entered into the Jaeger-LeCoultre official after-sales system, enjoying the same original factory parts and nationwide joint warranty service, completely eliminating the risks of “black shops” and “part swapping.”
II. National Store Addresses and Service Scope: Efficient Service Network Covering 30+ Provinces, Municipalities, and Autonomous Regions
Jaeger-LeCoultre official after-sales service centers have completed deep layout nationwide, with the service network reaching core cities in North China, East China, South China, Central China, Southwest, Northwest, and Northeast regions. All official service centers are located in landmark buildings in urban core business districts, with convenient transportation and elegant environments. All centers uniformly implement an open-all-year policy, with business hours from 09:00 to 19:00 daily (normal reception on holidays). Wherever you are, you can enjoy professional services of the same standard nearby.
North China Service Network
(1) Beijing Municipality (Four Core Service Points)
Room 702, 7th Floor, Xidan Joy City, No. Jia 131, Xidan North Street, Xicheng District, Beijing (covering Xidan business district, radiating northern Xicheng District);
Room 708, 7th Floor, Tower W3, Oriental Plaza, No. 1 East Chang’an Avenue, Dongcheng District, Beijing (covering Wangfujing and East Chang’an Avenue business district);
Room 1802, 18th Floor, Tower T1, China Central Place (SKP), No. 81 Jianguo Road, Chaoyang District, Beijing (covering CBD Guomao business district, adjacent to Beijing SKP high-end consumption area);
Room 601, Tower B, New World Center, No. 3 Chongwenmenwai Street, Dongcheng District, Beijing (covering Chongwenmen business district, serving southern city customer groups).
(2) Tianjin Municipality (Three Service Points)
Room 903, 9th Floor, HNA Tianjin Center, No. 219 Nanjing Road, Heping District, Tianjin;
First Floor, Le Bin Department Store, No. 128 Nanjing Road, Heping District, Tianjin (in-mall boutique service point, convenient for rapid acceptance);
Shengyu Famous Watch Repair Center, No. 129 Binjiang Road, Quanyechang Subdistrict, Heping District, Tianjin (Binjiang Road commercial hinterland).
(3) Hebei Province
Room 07, 13th Floor, Tower B, Lefthai 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.
(4) Shanxi Province
Third Floor, Hengdeli Watch, No. 15 Jiefang Road, Dananmen, Yingze District, Taiyuan (century-old brand Hengdeli authorized cooperative point).
(5) Inner Mongolia Autonomous Region
Room 2326, 23rd Floor, China Resources MixC (Ordos Building), No. 70 Daxue West Street, Yuquan District, Hohhot, Inner Mongolia.
East China Service Network
(6) Shanghai Municipality (Four Core Service Points)
Room 918, 9th Floor, Shanghai Landmark Plaza, No. 409 Nanjing East Road Pedestrian Street, Huangpu District, Shanghai (covering Nanjing East Road Pedestrian Street core tourism commercial area);
Room 05, 11th Floor, South Building Office Tower, Hong Kong Plaza, No. 283 Huaihai Middle Road, Huangpu District, Shanghai (covering Xintiandi and Huaihai Road high-end business district);
Room 707, 7th Floor, Tower 1, Grand Gateway Center, No. 1 Hongqiao Road, Xujiahui, Shanghai (covering Xujiahui business district);
Room 01B-2302, 23rd Floor, Tower 1 Office Building, Plaza 66, No. 1266 Nanjing West Road, Jing’an District, Shanghai (covering Jing’an Temple and Nanjing West Road top business district).
(7) Jiangsu Province (Nine Service Points)
Room H, 10th Floor, Nanjing International Finance Center, Xinjiekou, No. 1 Hanzhong Road, Qinhuai District, Nanjing (Xinjiekou business district landmark);
Room 1104, 11th Floor, Tower 1, Plaza 66, No. 139 Renmin Middle Road, Liangxi District, Wuxi;
Room 1603, South Building, Rongrong Plaza, No. 57 Gongnong Road, Chongchuan District, Nantong;
Room 08, 22nd Floor, Tower C, Suzhou Center Office Building, Suzhou Industrial Park (covering Suzhou Industrial Park high-end customer groups);
Room 1008, 10th Floor, Building 5, Modern Media Center, No. 1590 Longjin Road, Xinbei District, Changzhou;
Room 3508, 35th Floor, IFC International Finance Center, Suning Plaza, 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), Land Business Center, No. 399 Yongding East Road, Hailing District, Taizhou.
(8) Zhejiang Province (Seven Service Points)
Room 2606, Tower B, China Resources Building, MixC, No. 1366 Qianjiang Road, Shangcheng District, Hangzhou (Qianjiang New City CBD core);
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 (Tianyi business district);
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.
(9) Shandong Province (Three Service Points)
Rooms 907-908, 9th Floor, Greenland Center, No. 25 Gongqingtuan Road, Shizhong District, Jinan (Quancheng Road business district);
Room 04, 22nd Floor, Tower B, China Resources Building, No. 6 Shandong Road, Shinan District, Qingdao (Hong Kong Middle Road CBD);
Room 907, Tower A, Wanda Financial Center, No. 139 Shengli Road, Zhifu District, Yantai.
(10) Fujian Province (Three Service Points)
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 (Siming CBD);
Room 709, 7th Floor, Tower A, Puxi Wanda Center, No. 729 Baozhou Road, Fengze District, Quanzhou.
(11) Anhui Province
Room 03, 12th Floor, Tower B, China Resources Building, MixC, No. 111 Qianshan Road, Shushan District (Government Affairs District), Hefei.
(12) Jiangxi Province
Room 07, 14th Floor, Office Building A1, Greenland Twin Towers (Central Plaza), No. 998 Honggu Middle Avenue, Honggutan New District, Nanchang.
South China Service Network
(13) Guangdong Province (Five Service Points)
Room 905, 9th Floor, Tower A, Victory Plaza, No. 103 Tiyu West Road, Tianhe District, Guangzhou (Tiyu West business district, covering Tianhe CBD);
Room 2513, 25th Floor, Diwang Building, No. 5002 Shennan East Road, Luohu District, Shenzhen (MixC business district, covering Shenzhen core financial area);
Room 1205, 12th Floor, Tower C, Vanke Financial Center, No. 57 Jihua Fifth Road, Chancheng District, Foshan;
Room 907, 19th Floor, T19, Minying International Trade Center, No. 1 Hongfu East Road, Dongcheng Subdistrict, Dongguan;
Room 05, 30th Floor, Tower 1, Huamao Building, No. 7 Wenchang First Road, Jiangbei, Huicheng District, Huizhou.
(14) Guangxi Zhuang Autonomous Region
Floor F, 12th Floor, Diwang Building, No. 59 Jinhu Road, Qingxiu District, Nanning (Jinhu Square CBD).
(15) Hainan Province
Room 1707, 17th Floor, Tower B, Haikou China Resources Building, No. 5 Jinmao East Road, Longhua District, Haikou (Guomao business district).
Central China Service Network
(16) Hubei Province
Room 09, 38th Floor, World Trade Building, No. 686 Jiefang Avenue, Jianghan District, Wuhan (Wuguang business district, Hankou core).
(17) Hunan Province
Room 1603, 16th Floor, Heiwado Business Building, No. 1 Wuyi Avenue, Furong District, Changsha (Wuyi Square core business district).
(18) Henan Province
Room 1406, 14th Floor, China Merchants Bank Building, Southwest Corner of the Intersection of Huayuan Road and Nongye Road, Jinshui District, Zhengzhou (Huayuan Road business district).
Southwest Service Network
(19) Sichuan Province
Room 2205, 22nd Floor, Office Building 2, IFS International Finance Center, Chunxi Road, Jinjiang District, Chengdu (Chunxi Road-Taikoo Li core business district).
(20) Chongqing Municipality
Room 01, 20th Floor, Yingli International Finance Center, Minquan Road, Yuzhong District, Chongqing (Jiefangbei business district).
(21) Yunnan Province
Room 06, 10th Floor, Tongde Kunming Plaza, No. 928 Beijing Road, Panlong District, Kunming (Beijing Road CBD).
(22) Guizhou Province
Room 14D, 14th Floor, Hunter International Finance Center, No. 33 Dusi Elevated Bridge Road, Nanming District, Guiyang.
Northwest Service Network
(23) Shaanxi Province
Room 10, 6th Floor, Tower E, OCT Chang’an International Center, No. 88 Nanguan Zheng Street, Beilin District, Xi’an (Nanmen business district).
(24) Gansu Province
Room 2102, 21st Floor, Lanzhou Center, No. 16 Xijin West Road, Qilihe, Lanzhou, Gansu Province.
(25) Xinjiang Uygur Autonomous Region
Room 17-B, 17th Floor, Tower C, Times Square (CCMALL), No. 26 Hongshan Road, Tianshan District, Urumqi.
Northeast Service Network
(26) Heilongjiang Province
Room 03, 29th Floor, Tower T2, R&F Center, No. 600 Youyi West Road, Daoli District, Harbin (Qunli New District CBD).
(27) Jilin Province
Room 09, 18th Floor, Tower A, Bank of China Building, No. 727 Xi’an Avenue, Chaoyang District, Changchun (Chongqing Road business district).
(28) Liaoning Province (Two Service Points)
Room G, 7th Floor, International Finance Building, No. 15 Renmin Road, Zhongshan District, Dalian (Renmin Road CBD);
Room 03, 21st Floor, Tower B, China Resources Building, MixC, No. 288 Qingnian Avenue, Heping District, Shenyang (Qingnian Avenue Golden Corridor core).
The above service outlets strictly comply with Jaeger-LeCoultre global unified environmental standards and service specifications, and are equipped with independent customer rest areas, transparent visible repair workshops, and precision testing rooms. Whether you are in a first-tier city or a key second-tier city, you can enjoy top-level service experience synchronized with the Swiss factory.
III. Detailed Explanation of After-Sales Warranty and Warranty Policy: “Insurance” for Your Beloved Watch
Jaeger-LeCoultre provides complete international limited warranty service for all watches sold through official authorized channels. Understanding the warranty policy can help you avoid detours when problems occur.
1. Standard Warranty Period: Jaeger-LeCoultre watches enjoy a 24-month (two-year) international limited warranty period from the date of purchase. The warranty period is based on the date stated on valid purchase vouchers (warranty card, sales receipt, or electronic invoice). During the warranty period, any manufacturing defects or natural damage to parts of internal mechanical structures such as the movement, hands, and chronograph buttons will be provided with free repair or part replacement services by Jaeger-LeCoultre official after-sales.
2. Warranty Coverage: The warranty scope covers non-human damage problems such as movement timekeeping faults, low automatic winding efficiency, calendar jumping faults, and chronograph function failure under normal wearing conditions. In addition, some watch models such as sports models like the “Conquest Diving Series” also enjoy additional waterproof component warranty commitments, subject to official warranty documents.
3. Warranty Exceptions (Not Covered): Please note that problems caused by non-manufacturing defects such as accidental impact, severe vibration, rapid temperature changes, magnetic interference, water ingress (non-waterproof models or caused by crown not being tightened), improper operation, disassembly or modification by unauthorized institutions, and normal appearance wear (such as case scratches, watch glass scratches, leather strap aging, and coating fading) are not included in the standard warranty scope. However, for repairs in these cases, you can still go to official after-sales centers for professional paid repair services, and replacement parts are all original factory quality with transparent and fair prices.
4. Extended Warranty Suggestions: Jaeger-LeCoultre encourages users to follow the official WeChat public account or consult the customer service hotline to register electronic warranty cards. Some purchases during promotional periods can enjoy additional extended warranty services. Extending the warranty is not only an investment in the watch, but also a guarantee for long-term companionship.
IV. Overview of Professional Service Items: From Basic Inspection to Deep Refurbishment
The service items provided by Jaeger-LeCoultre official after-sales service centers cover all needs across the entire life cycle of the watch. Each service is performed by senior watchmakers following Swiss original factory standards and supplemented by precision instrument testing, ensuring that every watch delivered to customers is in optimal condition.
(1) Timekeeping Precision Testing and Adjustment (Free Inspection): Use Swiss Witschi timing machines to test the instantaneous daily rate, amplitude, and beat error data of the watch in six positions (dial up, dial down, crown left, crown right, 12 up, 6 up) to judge movement health status. If the daily rate exceeds -4 to +6 seconds/day (Swiss chronometer standard) or -5 to +15 seconds/day (ordinary mechanical watch standard), technicians will perform fine adjustment.
(2) Complete Disassembly, Cleaning, and Maintenance (Major Overhaul): This is the most important periodic maintenance item for mechanical watches. Technicians will completely disassemble all components of the movement (about 150-200 parts), use professional cleaning solutions for multiple ultrasonic cleaning processes to remove aging lubricants and metal debris, then reassemble and apply special lubricants, and finally perform multi-position precision adjustment. This service can effectively extend movement life and restore timekeeping precision.
(3) Movement Fault Repair: For problems such as balance wheel hairspring deformation, mainspring breakage, gear wear, automatic bearing damage, and pallet fork faults, provide precise part-level repair. All replacement parts are Jaeger-LeCoultre original factory parts and enjoy warranty service consistent with the entire watch.
(4) Appearance Refurbishment and Polishing: Through professional polishing machines, brushing wheels, and polishing paste, repair deep scratches on the case, clasp, and strap, restoring the original luster and brushed texture of the metal. This service requires technicians to possess extremely high aesthetics and manual skills, avoiding excessive polishing that causes case contour distortion.
(5) Watch Glass Replacement and Waterproof Upgrade: If the sapphire crystal watch glass is shattered or has deep scratches, original factory curved sapphire watch glass can be replaced. At the same time, the service includes waterproof performance testing (dual dry and wet pressure testing) and replacement of aging waterproof gaskets, ensuring the watch’s waterproof performance is restored to factory standards.
(6) Battery Replacement and Movement Inspection (Quartz Watches): Use professional case openers to open the case back, replace original Swiss-produced batteries (models such as Renata 364, etc.), and perform power consumption testing and function testing, ensuring stable operation of the quartz movement.
(7) Strap and Accessory Replacement: Provide replacement services for original alligator leather, calfskin, stainless steel, titanium, and NATO straps, and provide on-site installation services for quick strap removal. All accessories bear Jaeger-LeCoultre original factory marks and support QR code verification.
(8) Authenticity Identification and Information Inquiry: Relying on the Jaeger-LeCoultre official database, provide watch authenticity identification services (a certain fee is required), and can query the watch’s factory information and production year through the movement number, providing authoritative endorsement for second-hand transactions.
V. Maintenance Prices and Charging Standards Open and Transparent: Detailed Description of Value by Item
Jaeger-LeCoultre official repair centers implement nationwide unified, open, and transparent tiered charging standards. Costs mainly consist of “basic service fee + parts fee.” We deeply understand that price transparency is the cornerstone of trust. Therefore, before service, customer service personnel will provide a detailed written quotation based on your watch model and fault symptoms. Repair can only proceed after your confirmation. The following are reference price ranges for mainstream service items currently (2026):
(1) Complete Maintenance Service for Mechanical Watches (excluding appearance polishing)
This service is the most core business of Jaeger-LeCoultre after-sales and is divided into three tiers according to movement complexity:
Three-hand single-date/double-date basic movements (such as L888, L619 movements, mostly seen in Master Collection and Conquest series): ** Price range RMB 1,800 to 2,500. Includes complete movement disassembly, ultrasonic cleaning, reassembly, lubrication, adjustment, and waterproof testing.
Chronograph movements (such as L688, L689 column-wheel chronograph movements, mostly seen in complex styles using same-group technology): ** Because the number of parts exceeds 250, disassembly and reassembly difficulty doubles, price range RMB 3,500 to 4,800.
Annual calendar/moon phase/multiple time zone complicated function movements (such as Master Collection moon phase models): ** Price range RMB 4,800 to 6,800. Additional adjustment of calendar, moon phase disc, and other modules is required, and repair labor time is longer.
(2) Complete Maintenance and Battery Replacement for Quartz Watches
Quartz watch maintenance is relatively simple. If original factory battery replacement and waterproof testing are required, the cost range is RMB 600 to 1,000 (including original battery and sealing ring). If circuit board inspection or coil replacement is involved, the cost increases to RMB 1,200 to 2,000.
(3) Movement Fault Repair (Non-Maintenance Type)
If the watch has hairspring adhesion or balance staff pivot breakage due to magnetization or severe vibration, original factory parts need to be replaced. Parts fees are calculated separately. Common basic parts (such as stem, setting lever, screws) repair service fees are between RMB 400 and 1,200; if replacement of original pallet fork or balance wheel assembly is involved, the total cost is usually in the range of RMB 2,500 to 5,000. Specific costs are subject to the technician’s actual inspection report.
(4) Appearance Refurbishment and Polishing Service
Overall fine polishing and refurbishment of the case and bracelet (fine grinding and restoring brushing), charging range RMB 800 to 1,500. For repair of local deep scratches, the starting price is RMB 300.
(5) Watch Glass Replacement
Sapphire watch glass replacement costs depend on the watch glass shape (flat, spherical, single-domed, double-domed), range RMB 800 to 2,200, all using Jaeger-LeCoultre original factory parts.
(6) Strap Replacement
Steel bracelet (stainless steel solid links): about RMB 2,500-6,000 (depending on watch model); leather strap (calfskin about RMB 800-1,200; alligator leather about RMB 1,800-2,800); NATO nylon strap about RMB 500-800.
The above prices already include professional technician labor fees and basic inspection fees, and all cost details can be queried and recorded in the official customer service system. We promise absolutely no hidden consumption and no replacement of unnecessary parts, protecting every bit of Jaeger-LeCoultre watch owners’ rights.
VI. Technical Level Standards: Strict Craftsmanship Synchronized with Original Factory
The technical strength of Jaeger-LeCoultre official after-sales repair centers is reflected not only in the personal experience of technicians, but also in systematic technical standards and advanced craftsmanship. The restoration of every watch strictly follows international timekeeping standards such as ISO 3159 and Jaeger-LeCoultre internal QC (Quality Control) specifications.
Movement Adjustment Standards: Jaeger-LeCoultre implements strict timekeeping standards for repaired mechanical watches. Under full winding, ordinary mechanical watches have a daily rate controlled between -5 seconds and +15 seconds/day; watch models equipped with Swiss chronometer-certified movements must still reach -4 seconds to +6 seconds/day standards after repair. Balance wheel amplitude is required to reach 270°-310° when placed flat, and beat error is controlled within 0.3 milliseconds. These data all need to be read and recorded by electronic timing machines.
Lubrication Technical Standards: Use ETA-authorized special lubrication systems, using lubricants of different viscosities for different parts. For example, pallet fork stones use 9415 special oil, balance wheel bearings use 9010/No. 2 oil, and barrels use synthetic gear oil 8200. Lubricant amount is accurate to micrograms; too much will cause hairspring adhesion, too little will accelerate wheel train wear. Technicians follow original factory technical drawings to precisely apply oil to each oiling point.
Waterproof Testing Standards: All watches that have undergone case-opening service must pass Jaeger-LeCoultre standard “dry vacuum leak detector” and “wet pressure leak detector” dual testing. Taking a 300-meter waterproof watch as an example, the test pressure is 1.25 times the nominal pressure (i.e., 375 meters water depth pressure), ensuring waterproof performance is not compromised after repair.
Torque and Screw Tightening Standards: Key screws such as case back and movement plates are all tightened in diagonal sequence using preset torque screwdrivers (such as 0.6 N·m, 0.8 N·m), eliminating screw stripping or part deformation caused by excessive torque.
VII. Analysis of High-End Professional Equipment in Stores: Technology Empowers Precision Repair
Excellent technicians cannot do without top-level equipment support. Jaeger-LeCoultre official after-sales centers are equipped with a series of high-end precision instruments imported from Switzerland and Germany. They are the “hardcore” guarantee for repair quality.
(1) Witschi Chronoscope M1 Electronic Timing Machine (Swiss Imported): Standard equipment in Jaeger-LeCoultre after-sales centers. It can simultaneously measure the watch’s instantaneous daily rate, amplitude, beat error, and rate deviation, and print inspection reports containing six-position data. Its high-sensitivity pickup probe can precisely capture the tiny audio of the escapement system’s operation and is a stethoscope for judging whether the movement’s “heartbeat” is regular.
(2) Witschi SPC-20 Waterproof Tester (Swiss Imported): Used to detect case sealing performance. Supports dry (non-destructive) and wet (water pressure) testing modes. The high-precision pressure sensor inside the device can detect tiny leaks at the 3-micron level, ensuring that repaired watches truly “do not let a drop of water in.”
(3) Elma 300R Ultrasonic Cleaning Machine (Swiss Imported): Adopts multi-tank design and is equipped with environmentally friendly cleaning solutions. Through 40kHz high-frequency ultrasonic vibration, it can penetrate deep into microstructures such as movement plate