Yes, it is. Not because of the service costs from PP. I was positively surprised..
Authenticity - you should ask for the archive documents, at least.
Flaws, this is the tricky part when it comes to vintage. I took care of so many details and failed at the end - in that case.
I loved every second while owning that specific watch, until I found the flaw :-(
Next time I have to do my homework even better!
Oliver