Two of my vintage manual wind watches (1 shanghai and 1 longines) are off by more than a minute a day. and i just picked up a seiko 6139 the day setting isn't working on it. I know a few people on this forum seem to spend a fair bit of time in shanghai. I was hoping one of them could recommend a watchmaker to me. The manual winds would probably be easy for them but i would imagine the 6139 would need a relatively skilled guy.
Thanks in advance.