I have heard some people say that the bezel on these is plastic ? but i dont believe that . Does anyone know ? And is the bezel all one piece or glued in ?
Its an anodised aluminium insert with interference fit into a steel bezel shell. There is no plastic used on those.
They changed to ceramic a few years later, but I don't think Omega has ever used plastic for a bezel.
Well, that's not correct. The early Seamaster 300 (2913 up to 166.024) had a bakelite bezel... what is actually a duroplast... in other words plastic.