Is that real vintage Omega seamaster 300 ?

Hello.

I have few photos of sellers claimed vintage omega seamaster 300 is that real ?

No Omega expert here so I don't want to mislead, but that dial looks too good to be true. The patina on the hands and indices is so uniform and perfect. Like safe-queen perfect, while clearly the underside of the case has seen wear. I have no doubt that it's a legit SM300 166.024, it's just how much work has been done to the dial/hands. The sweeping seconds hand should be WHITE in original condition. Not chrome, not black, etc.

My understanding is that these weren't as water-resistant as Omega claimed and as a result a lot of dials have/had moisture ingress and/or the patination of the hands indexes isn't as even. I would also question that bezel, most will have luminated/patinated numerals and triangle. This might be a service bezel. Would need another opinion though.

Please spend some time with this site: https://www.omegaseamaster300.com/ it's a fantastic reference. Many bezels were used and there are surely a number of variations.

Hands looks like painted black.

Case and bezel are fake - they've just been weathered to look real.
The dial is also fake.

I could be wrong here as I'm no Seamaster 300 expert but AFAIK the 565 & 562 movements were NOT adjusted to 5 positions & temperature as the photos show. These SM300 watches are not chronometer grade.
My WatchCo SM300 certainly is not.....

And, my understanding is 565 & 562 are 17 or 18 jewels, not 24.
OR, am i mistaken??

The parts don't look like they have lived together for 50-odd years. I have a lot of ??? about this one.

I agree this looks suspect. The condition of the dial, bezel, and hands just dont match the rest of the watch, especially the grimy movement.
What is the give away that the case is "fake"?

Strange how the lume looks so even.