Omega from the 50's

Posts
116
Likes
1,063
I'm looking at this Omega I found for sale.
Can anyone tell me about the authenticity of this old piece?

Sellers info:
Cal. 265
Serie no: 13139892
Year 1952
Crown and glass changed
Original dial
Case diameter 34mm

Thanks in advance.
Frans
Edited:
 
Posts
116
Likes
1,063
Sorry no pics of the movement, but seller tells that it's recently serviced by a watchmaker (I heard only positive reviews about this well known watchmaker) and the caliber is 265.