I think it was designed in Praha in 1920 and then Boniface Petrik moved to France to have Damon manufacture it. It is possible that the design could have been completed in France. I'm curious if any exists without French proofmarks.


U.S. of A. Patent 1434627 to Boniface Petrik/Societe Petrik & Cie.

http://depatisnet.dpma.de/DepatisNet/depatisnet?action=pdf&docid=FR000000512493A
French Patent of 1920

http://www.littlegun.info/arme%20francaise/artisans%20p%20q%20r/a%20petrik%20damon%20gb.htm

Kind Regards,

Raimey
rse