What is Overhaul?
A watch overhaul (often called a “full service”) is a complete maintenance process where a mechanical watch is taken apart, cleaned, repaired if necessary, and reassembled to restore its performance.
Here’s what it typically involves:
1. Full disassembly
The movement is completely taken apart into individual components—sometimes over 100 parts.
2. Inspection & repair
Each part is checked for wear or damage. Worn components may be repaired or replaced to ensure proper function.
3. Cleaning
All components are cleaned (usually in ultrasonic machines) to remove old oils, dirt, and debris that affect performance.
4. Reassembly & lubrication
The movement is reassembled and lubricated with precise amounts of specialized oils at specific friction points.
5. Regulation
The movement is adjusted for accuracy to fine-tune rate, amplitude, and beat error.
6. Case service
The case, crown, and gaskets may be cleaned or replaced; water resistance is tested if applicable.
7. Testing
The watch is tested over several days to ensure stable performance and reliability.