I would think this watch dates from the 60s. If you can give me the movement number I can confirm it. Unless I am mistaken this movement is a Valjoux 13" 72C (VZHC)
UNs archive works off the movement serial number. Their archive is not complete but you might be lucky if it is from their factory. Personally, at this time I cant see any evidence that it is.
The watch would probably have a Valjoux 69 and measures about 30 - 32mm without the crown. The dial is not original. I have a Universal chronograph the same as this one.
I can't thank you enough for this infomation. Mr Eital sounds like an outstanding individual, I;m honoured to be the caretaker of his watch. This is why I like personalized watches... many have really interesting stories....