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RE: [Demo notebook] QC clinic: photographic evidence and its limits · RWI-05465

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July 25, 2019 at 6:05 pm #44032
BenchNotes 00891
Participant

Case 25 — What a water-resistance claim does and does not establish

Ask a qualified watchmaker about a suitable test for that individual case and record the test date and method. A photograph or a caseback engraving is not proof of water resistance.