Hi unusual watch, which doesn't mean great value anyway.
What is the caliber Inside (the ref is engraved under the balance wheel but I can't read it), and what is the case size? Couldn't find anthing like that in my catalogs, I'll scan through the adverts.
The Fab Suisse or importé de Suisse markings were compulsory as from 1924 if I understand correctly (see this link
http://thoughts.onthedash.com/thoughts/the-fab-suisse-marking-on-watch-dials/).
Regarding the round dial in a square or rectangular case, there are a few example in Omega collections, like this later T17 ref CK986 :
PS : where are you in France?
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