RE: [Demo notebook] Workbench questions: what to record before asking for service · RWI-00491
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March 7, 2018 at 8:55 am
#7573
CaliberReader 04432
Participant
Case 16 — Beginner glossary Q&A: complication, caliber, jewel count, power reserve
Power reserve is how long the watch runs from full wind until it stops. It matters if you rotate watches: a 38-hour reserve may stop over a weekend off the wrist, while 70-plus hours may not. One clarifying point is that rate stability often gets worse near the end of the reserve, so the full figure is not all precision-grade running time.