I would recommend ordering an Extract of the Archives once the museum opens.
The value on a Ploprof is increased if you get an EoA conforming the movement for a Ploprof, as so many have been exchanged in the past.
Yours seem to be a 32.064.xxx serial, and just for reference my EoA confirmed Ploprof is a 32.058.xxx that left Omega in June 1972.
So you have a valuable watch there, be careful with the diving, check for moisture after each dive not to damage anything inside. And wear it!!
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