Hi, I am new learning about vintage Omega watches after spending about 15 hours reading the last few days.(It's a bit addictive!) I bought this watch a few days ago. The seller sold it has a 14k gold filled Omega Seamaster cal. 560. It's still in the post so have not had a chance to open it up and check the movement, seller is on Ebay and has 4000+ sales with 100% positive feedback, says he had a watch maker look at it and told him it was 560 cal but did not have reference number. What do you guys think? looks like the right case/dial for that time period? Thanks for any input!