Thank you for your opinion and advice.
I do realize that to "date" PP watches is not as straight forward as let's say Rolex
(not to say that it is 'straight forward' - but for sure easier).
If the Archive papers stated either date of manufacturing or date of sale during 1965 - I'd be
perfectly fine with that ;-)
Another criteria I forgot to mention is that I 'really' would love for this watch to be self-winding.
Looking forward to hear more replies.