Recently I have been developing a fascination with a Seamaster 60 M 166.062. They seem to be pretty scarce and don't surface too often. I have been researching them and they were produced from the late 60's to very early 70's. Does anyone know if Omega made them with different movements? From what I have seen, it should be a cal. 565 24J, but have come across 2 that had a different cal. One had a cal. 561 24J, and the other had a cal. 563 17J. I would like to buy one that is original. Thanks!