Hi all. I asked this earlier today in the Watchmakers' forum, only got one response so far. Since there is much more activity in this forum, I will ask here: How often do you service an old mechanical watch, and what role is played by the conditions of use/abuse?
I have searched the 'net and found the 3-7 year recommendation, but those mostly come from watch repairers. I'm wondering if it is really needed that often. And yes, I don't know much about old mechanical watches.