No "Seamaster" on the dial? Lumed hands and black hour markers with lume dots? I'm not convinced by this one Lets see
Looks fine to me. Not a Seamaster. Just an Omega automatic. Most likely from the early 60's, 500 series calibre.
Dial looks original to my eyes, but perhaps not original to the watch. Possibly a service dial, or cannibalized from another watch altogether. Art