Many folks including some watchmakers I've talked to feel that 5 - 7 years is an appropriate interval between services, but all agree that if the watch is used underwater it should be pressure tested annually to verify its watertight integrity.
Btw, here's a quick pic of a Rolex rotor pivot after 7 years. The upper groove shouldn't be there. Any guess as to where the missing metal went? Some here will say "if it ain't broke, don't fix it". That's ok for them, but it doesn't work for me. I want every mechanical device I own to be in perfect working condition or I don't want to own it. YMMV.
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Member #1,315
I don't want to get technical, but according to chemistry alcohol IS a solution!
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