hi finally got time to take detailed pics of this omega constellation for French market. Originally it came fitted with "feb sussi " dial . There are some questions on the case back markings . Experts plz comment? View attachment 452579

 

backcase i belive homemade started of as a part of pocket watch

 

Here's mine,

The inside case back looks much tidier, it almost looks to me like your medallion was a later addition, or as though the observatory has been stamped in?

 

Are these suppose to be the eagle stamps

 

Yes they are, quite a few to be seen here:

https://omegaforums.net/threads/fab-suisse-roll-call.20625/

 

Observatory with no brick work?

 

The French hallmarks are OK (faded but likely correct eagle heads and the maker's logo into a lozenge).

But the medallion is very likely a replacement and maybe a fake. So I guess the case back is not original to the watch.

 

The case back seems to be original and is perfect fit .
Medallion is not correct as per the other examples

 

Your are probably right. So the dial may not be original as well.