I have a vintage omega, 10ct, automatic and I was told the 550 movement. I appreciate any help I can get finding the specifics. (New straps)

 

Measure the distance between the lugs. That will tell you the strap measurements. Keep the original if it has an omega logo on it. But easy to source a new strap.

The exact model number is inside the caseback. The movement number and serial are on the movement. Have someone qualified to open the watch do it to prevent damage to the gold filled case.