Daily "is it Franken?" mission

Hi,
I am new here and I am looking for my first vintage watch. I need some support regarding identification of a vintage Omega that has attracted my attention .
I got information from seller that it is a 35 mm "vintage bumper" from 1950 and I assume that the movement is indeed the "bumper" - serial number indicate that it was made in 1950 (12253584). However I cannot find any same watch in the entire web. The ref number on the inside of the plate is 2398-1H and the cal. 322.

Is anyone able to asssess whether it is a frankenwatch or not?
Thank you in advance! 😀

Try this from OF


References often had a number of different dial styles.
Your pics aren’t good enough to tell if the dial is original or repainted.

Nice, but this is NOT "patina". pass!