RE: [Demo notebook] Workbench questions: what to record before asking for service · RWI-09543
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Case 39 — Maintenance question: how do I tell if an automatic actually needs service? · source wording exercise
Common advice says service every five years, but service is expensive and some people run watches much longer. What observable signs actually indicate a mechanical watch needs attention, as opposed to just being due on a calendar?
Review focus: source wording. Retain the source wording beside any paraphrase. Use the original answer fragment “Useful signs, in rough order of seriousness: power reserve noticeably shorter…” as the discussion anchor; no new event or result is supplied.
Exercise RWI-09543/39: address this question within its stated limits.