RE: [Demo notebook] Reference notebook: corrections and recurring beginner questions · RWI-08592
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June 6, 2020 at 11:20 pm
#66562
BenchNotes 03421
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Case 30 — 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.