Compare realistic mechanical-watch service frequency for time-only, date, GMT, chronograph and high-complication watches.
| Complication | Typical planning range |
|---|---|
| Time-only | Often about 5–10 years |
| Date | Often about 5–8 years |
| GMT | Often about 4–7 years |
| Chronograph | Often about 4–6 years |
| High calendar complications | Often more disciplined 3–5+ year planning |
More parts, more functions and more user interactions usually mean more points where lubrication aging and wear matter. Chronographs and high calendars especially benefit from disciplined service planning.
Brand guidance, environment, storage and actual condition can move the right interval earlier or later.
How often should a chronograph be serviced? Many owners plan more carefully than with simple time-only watches, often around a 4–6 year practical window depending on use.
Do GMT watches need more service than date watches? Not always dramatically, but travel-watch usage and extra mechanism complexity can justify more disciplined planning.
What about perpetual calendars? High complications deserve attentive service planning and specialist care.
Can a time-only watch go longer between services? Often yes if it runs well, but oils still age. Do not wait for failure as the only strategy.