Hi. Your watch looks great, cool patina and a great story behind it! Yours looks exactly like mine: case, bezel, dial, hands, button, date wheel, fully original. Both show the dial degradation, yours has been just more in really active use.
So I don’t believe any crucial parts have been changed or replaced on your watch.
Here’s some shots of mine to compare as well as a old advertisment from Omega with the same configuration.
Do you have the serial number of the movement for your watch?
Check also this site:
https://www.omegaploprof.com/Click to expand...