It's a manual wind from the late 50's or 60's, probably with a caliber 30L inside. Might have a 23Z or 12.68 too. Pop off the back and post clear pics of the inside of the caseback and movement so we can see the numbers and we can tell you what year it was made.
Early 1961. Case reference 7176. Acier inoxydable means stainless steel. Another round of "Stump the Mod" won by the house. Thanks for playing! :wink::laugh:
Wait... I'm not the moderator anymore. :blink:
Anyhow, that's a pretty nice watch. The gunk on the dial might clean up if you remove it from the watch and dip it in one of those jewelry cleaners that consist of sodium carbonate. Just don't put the metal plate in the solution that causes the chemical reaction. You should take it to have the internals cleaned, oiled, and adjusted by a watchmaker and ask him if he can clean the dial maybe. DO NOT REFINISH IT! That kills the value.