I`m definitely not recommending myself on this one, here's why:
The older quartz movements are far more challenging to fix and often require parts that I can`t source. It's not that I don`t like them, they're very nicely engineered and have a quality feel, but they do end up needing parts when they're old.
I strongly recommend STS or Omega, possibly Duncan Potter at Genesis, but in my opinion this has to go to someone who can access parts. The last one I fixed ran OK but was eating batteries every 9-10 months which isn't good, it was the best I could do and at least the watch ran.
The watch looks nice, well worth sorting out, but there will be a significant cost, it isn`t like servicing a later (90s) ETA quartz movements which are very straightforward.