What accuracy to expect in the first 2–4 weeks after a full service, and when to worry.
A mechanical watch about 10 days after service showing around +6 to +10 seconds/day with a stable trend is often in a monitor-and-measure band. Large daily errors, worsening drift, or rough operation are reasons to contact the service centre sooner.
1. Use the same reliable reference clock each day.
2. Measure across normal wear, not only one static position.
3. Note average seconds/day over several days.
4. Compare against what the service centre said was achieved.
5. Contact them with dates and numbers, not only a feeling.
Brand standards, movement grade and the service centre’s stated result all matter. This guide is educational, not a warranty decision.
How long does a watch take to settle after service?Many owners judge mechanical watches across the first 2–4 weeks of real wear.
Is it normal for a watch to run fast after service?Mild variation can happen. Large or worsening error should be raised with the service centre.
When should I worry about accuracy after service?Worry sooner with big daily errors, worsening trend, stopping, or rough operation.
How should I measure post-service accuracy?Track several full days of normal wear against a reliable clock and keep notes.