Is this 18K vintage Omega Seamaster De Ville the real deal?

I got burnt recently trying to buy an Omega Seamaster that turned out to be fake. I'm now interested in purchasing this Omega Seamaster De Ville automatic, but is it the real deal?

It is 18K gold, has a case reference of 136.020 and is powered by Omega calibre 562 from 1964. Unfortunately, no pictures of the inside back cover or movement are available, but what should I be mindful of before buying it?

Is it worth $1,750? Any advice would be greatly appreciated!

This one looks to be a bad redial. I'd steer clear.

Refinished and over polished case. A no from me 😎