It’s what it says on the dial, an Omega automatic, nothing to add!
The watch is almost certainly 1950s judging from the style.
By virtue if its design this watch will not be waterproof, chances are it’ll have had moisture in at some point in the past so the movement may have some staining and tarnish.
Case would benefit from careful refinishing by someone like me, it’ll benefit from being serviced too regardless of how you think it’s running.
After servicing, refinishing and a decent leather strap it’ll make a v. nice dress watch. Hard to put a value on it without more information so I won’t speculate.