Question Author
Robb I'll try both of those things.
mcooky, I'm afraid that I'm one of those boringly rational people who analyses these things rather rigorously. So...
Do you know that skin becomes positively charged or are you just guessing? And why doesn't it discharge when you touch a tap or any other earthed object ('faucet' and 'grounded' to you, Clanad)?
Why should nickel, in particular, become negatively charged and, since it is a metal, why doesn't it discharge immediately through all the metal in the watch, which is touching the (allegedly) positively-charged skin?
A quartz watch often has the same metal case and metal gear-train to drive the hands. Only the escapement is different, which, I think, is made of springy steel in a mechanical watch.
Since (as others say) static electricity is usually held responsible, I still find it odd that no-one has explained how and why.
If I open a subscription list to fund me in a research programme on this subject will you each cough up �1000
please? No, make it five grand. Ten, maybe? What do you think?