https://omegaforums.net/threads/is-this-a-variant-of-an-omega-seamaster-300-ref-165-024.129887/
Regarding the blue bezel member
@vitriol wrote this:
"Hands and dial are legit Omega parts, just are service parts (165.0324)
Blue bezel insert may give you a headache. Blue inserts for a very long time were considered as transplants from Seamaster 120 166.073, but something like 6 months ago, TsoloT has posted blue insert on vintage 165.024 and said those are genuine, but produced in a very low quantity batch."