Vintage Omega Constellation Ref.2852 Cal 505 - Need help to verify Authenticity

Hi Forum,
Will need your kind help to verify if this is authentic.
I'm only limited to these photos here.
Thank you

First of all, welcome @Luminarc

Have you compared your watch to the dedicated thread on 2852s?
It would be worthwhile immersing yourself in that and the other threads on Constellations as well as Desmond’s blog if you are interested in Constellations.

The case on this watch is so heavily polished that it is almost unrecognisable.

The dials generally follow a closely defined style and don’t have lumps and bumps of paint on them like between the 6,7 markers and the star on this watch.
There are also a number of other ‘tells’ that this is a redial.

How does the seller describe the watch and what is the asking?