Hi, I'm a newbie, though I've owned several Omegas over the past 20 years or so. Currently I have two, a 3570.50 and a 3521.30. I love them both, I just got the triple date today for my daily wear, so although I'm nuts about the moonwatch, I'm not a purist and have a big respect for the 7750 and its variants.
Re the Triple Date series - my understanding is that my watch is a 3521, and that with the 3523 in 1996 the plain steel bezel changed to an insert. But all the photos I can find on the 3521 show the seahorse back, whereas mine is more plain. Also, I measure mine to be 39mm across, and I thought the early ones were 38mm. Can anyone help me date this piece, please? Thanks, Phil.