tigertom
·Or the previous owner sourced a commemorative caseback, and put it on his watch. There is no way to prove this alternative to be wrong as well 😗
Also possible, but imho highly unlikely, as I got the watch directly from a very well respected Austrian dealer (R.I.P. Heiner), who was living in Argentina and brought the watch over from there.
And yes, you are right, there is unfortunately no way to prove wether the caseback was mounted at the Omega factory or not, as they have no records of the exact caseback versions for each and every watch back then. Therefore I would be very interested in getting more information/input from the community here (not just written book „facts“, but own empirical findings and evidence)