Dyna PTT Key Circa 1930 - France

From F9WT: This key is in the 1931 DYNA CHABOT catalogue. I think it's the first key made by CHABOT in the 1920's , at the beginning. It's about the same that the 1920's Pericaud Key (Before to found his company, A.CHABOT worked for the PERICAUD factory).

Dyna Telegraph Key