So I popped open the back. The caliber appears to be 625. There is an omega logo with the number 40411646 on the mechanism. The inside of the back case says Omega watch co. 20 Microns Gold plated top Stainless Steel back Made in England DD6349 (which appears that DD reference is used on watches in the US collection, which would make sense).
I searched omegas site with this info and have come up with nothing. So I sent in a request for them to identify it.
Just wanted to keep you updated.
Thanks!