Luminous matches ok in many areas on the dial. Has the dreaded retainer ring on the back. Hate those as many have cross threaded them trying to screw them one
crown looks like a replacement
bumper movement, but won’t know which caliber until opened
omega made a large variety of dial and even today I’ve seen many I have never seen before. Bear in mind. You will only see one when someone posts one to the internet and even then it may not show up in a search