Acceptance and process are case-specific
The estimate confirms the exact complication, parts approach, disassembly depth, testing, water-resistance scope, warranty, timing, and feasibility before work begins.
High Complications, Uncompromised Precision: Servicing Chronographs, Perpetual Calendars, and Tourbillons at Gray & Sons
FAQ Answer: Gray & Sons evaluates high-complication watches for repair, restoration, and maintenance, including chronographs, perpetual calendars, and tourbillons; acceptance and scope are confirmed for the individual watch.
The Apex of Horology Requires Master-Level Craftsmanship
While a standard three-hand mechanical movement contains roughly 130 to 180 components, a high-complication watch can house anywhere from 300 to over 1,000 micro-engineered parts. Servicing these mechanical marvels demands far more than routine maintenance—it requires decades of specialized expertise, cleanroom environments, and dedicated horological tooling.
Whether you own a modern Patek Philippe Grand Complications, an Audemars Piguet Royal Oak Perpetual Calendar, a Breguet Classique Tourbillon, or a classic Rolex Daytona chronograph, Gray & Sons provides full-service care in our state-of-the-art workshop.
Complications We Handle Daily
1. Chronographs (Standard, Flyback, & Split-Seconds / Rattrapante)
Chronographs are among the most popular—and mechanically complex—daily complications. Beyond telling time, they function as high-precision stopwatches utilizing column wheels, horizontal or vertical clutches, and delicate heart-piece cams.
- Common Services: Reset mechanism synchronization, pusher seal replacement, column-wheel adjustment, depth-of-engagement alignment, and complete movement overhauls.
2. Perpetual Calendars & Annual Calendars
A perpetual calendar automatically accounts for months with 28, 30, and 31 days, as well as the four-year leap year cycle, requiring no manual adjustment until the year 2100.
- Common Services: Calendar module re-engagement, corrector lever alignment, moon phase gear calibration, date jumper spring replacement, and fluid lubrication of friction points.
3. Tourbillons
Invented to counter the effects of gravity on a watch's balance spring, the tourbillon houses the escapement and balance wheel inside a rotating cage—often weighing less than a fraction of a gram.
- Common Services: Micro-balancing of the tourbillon cage, balance poise refinement, hairspring truing under high-magnification microscopes, and ultra-low friction jewel oiling.
Why Trust Gray & Sons with Your High-Complication Timepiece?
Feature | Gray & Sons Standard | Standard Repair Shops |
Master Watchmakers | In-house Swiss-trained specialists with 150+ years combined experience | Provider staffing and outside routing vary; request the current written handling and responsibility model. |
Parts Integrity | Manufacturer/original, compatible, donor, refurbished, or custom-fabricated parts may be considered when technically appropriate, available, disclosed, and approved. | Parts policies vary; request the proposed category, source disclosure, approval flow, and availability limits in writing. |
Warranty | The written repair warranty uses a 12-month default, with a 24-month exception only for an approved modern Rolex repair scope expressly stated in the estimate or agreement. | Warranty terms vary by provider and scope; compare the current written coverage and exclusions. |
Diagnostics & Testing | Testing is selected for the watch and approved scope and may include relevant positional timing, power-reserve observation, and water-resistance assessment where suitable. | Testing protocols vary; compare the written acceptance criteria for the exact complication and repair. |
Security & Shipping | Fully insured, door-to-door physical & transit coverage | Transit, carrier, insurance, signature, and responsibility terms vary; follow the current written shipping instructions. |
Our 6-Step Restoration & Service Process
- Detailed Diagnostic & Estimate: We inspect the movement, case, and complication modules under magnification to provide a transparent, itemized quote before any work begins.
- Authorized Disassembly: The disassembly depth follows the diagnosed complication and work approved in the estimate.
- Ultrasonic Cleaning & Inspection: Components undergo multi-stage chemical and ultrasonic baths to strip away oxidized lubricants and microscopic debris.
- Refurbishment & Parts: Manufacturer/original, compatible, donor, refurbished, or custom-fabricated components may be considered when technically appropriate, available, disclosed, and approved.
- Precision Assembly & Lubrication: The movement is reassembled using specialized synthetic oils formulated for high-torque calendars and rapid-vibration escapements.
- Timing, Testing & Quality Control: The watch receives the movement-, complication-, and scope-appropriate checks documented for the repair.
Bring Your Timepiece to Gray & Sons
For inspection of a high-complication watch, submit a repair request through the Surfside showroom or the current mail-in repair process.
- Visit Us: 9595 Harding Ave, Surfside, FL 33154 (Across from Bal Harbour Shops)
- Request an Estimate: Get a free repair quote online or order an insured shipping box directly to your door.
Representative Repair Cases
Explore selected repairs from the Gray & Sons archive. A watch is evaluated individually, so the work required for another timepiece may differ.
Related Watch Repair Guides
Request a Watch Repair Evaluation
A repair request begins with an individual inspection and estimate. Send your watch securely or visit Gray & Sons in Surfside, Florida, to discuss the next step.