RE: [Demo notebook] Reference notebook: corrections and recurring beginner questions · RWI-00544
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March 12, 2018 at 6:30 pm
#8498
QCNotebook 05357
Participant
Case 14 — 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.