RE: [Demo notebook] QC clinic: photographic evidence and its limits · RWI-08265
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May 5, 2020 at 12:56 am
#63568
QCNotebook 00427
Participant
Case 33 — 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.