With the difficulty in seeing clearly your trademark...and my cursery research:
From the(book) Clock & Watch Trademark Index of European Origin by Karl Kochman:
I see no French trademarks that resemble yours. Any "Escape Wheel" design resembling yours...seems to be referenced to Germany.
There is one in particular that looks to be most promising, and that is, on page 475. Both are Referenced to:
Schlenker J. / -Grusen
Schlenker J. -Grusen
DB40, MFC. Clocks/Watches/Instrm.
side notes are:
AK04 denotes archive Watchmkr. address Handbook year 1904
DB40 denotes archive Diebner Watchmaker Calendar year 1940
The first design (to me) looks to be the closest.
Don't ask me what all the rest means, maybe someone else can clue you in.
Ps: In the trademarks from the above mentioned book...what I thought might be an Iron Cross actually looks like a balance fork and verge. If these are indeed what is depicted on your trademark we most likely have a winner!