It would be great if you could crop away the excess parts of your photos and re-post them so that we can actually get a good look at the watch instead of the background and strap. Unfortunately, it's hard to see much. Any other introductory information you'd like to provide about yourself and how you got the watch would be very welcome.
The dial usually has ‘automatic’ written on it under ‘OMEGA’. I think this is the first example that I’ve seen without it.
I’m guessing it left the factory with the word “automatic” but when it was redialed they left that out.
As far as value goes, search “omega bumper” on eBay and you’ll get an idea. Unfortunately the watch was redialed at some point and has lost most of its collector value. Additionally gold filled watches don’t seem to be as popular as there steel brothers. But it’s still a cool watch with a historic movement.