RE: [Demo notebook] QC clinic: photographic evidence and its limits · RWI-06757
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December 4, 2019 at 1:43 pm
#52674
CaseFile 09533
Participant
Case 29 — 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.