I've added the photo below. It looks utterly gorgeous and I must have one! While I've always loved Omega watches, I've never been able to identify them with the serial numbers and movements some of you can!
The reference number stamped inside the case back, coupled with the internet, is a very powerful tool.
Very difficult to say which model this is without more information, as stated above. Also, this example is redialed.
Agreed. That being said, the aesthetic is that of the Omega Seamaster dress watches (1950's - 1960s). OP, there are many of these available on Ebay for under $500; I think you should have no trouble finding what you're looking for. My profile picture is actually of an old Seamaster, though the case is slightly different than the one in your picture. Hope this helps!