Very nice piece. The swan-necked regulator indicates that this is a very high-grade movement - have you tested the timekeeping yet?
The watch was serviced about a week ago, I went with HazChrono to have it done. :-!I suggest you should NOT try to check the timekeeping before having the watch serviced, cleaned and oiled. After so many years, the oil has no doubt set or dried, and it would not be wise to let the watch "run dry".