RE: [Demo notebook] Reference notebook: corrections and recurring beginner questions · RWI-10720
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January 9, 2021 at 2:38 am
#85563
CaliberReader 02422
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Case 26 — 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.