I can't provide any Omega experitse, and you've got some of the best people on OF here, kind enough to answer your questions, but what I can provide is some personal insight. My first watch ever was vintage and it taught me some expensive lessons.
When you were asked to introduce yourself you should have mentioned your standing to watches in general.
What else do you own? Maybe a new piece would be better suited for you.
Is this your first vintage watch? If the answer is yes, going for an Omega isn't the smartest ideea.
What is your exact budget? If ~ 200 euro is expensive for a service to you then again, getting an Omega isn't the best ideea.
Also, servicing takes some time. My Watchmaker's wait period is one month, at the moment of this post(He's not that busy atm)And that's one month provided no parts are required or I acquire them prior to sending the watch in.
Whenever I consider a vintage watch, service is the first concern. I'd recommend getting to know a watchmaker first. Watches are a niche of collecting. It's not like getting a car serviced, a Watchmaker might even refuse to work on certain movements. I doubt that would be the case here.
There are many watches that are cheaper to service that provide what you are looking for. Also, study the marketplace here. That should give you a good way of how a vintage piece should be sold and what you're getting.