Made before 1922

Provisional black powder proof for breech loading guns, since 1924 reserved for smooth bore barrels.
Between 1847-1952 the stamp with the letter “F-J C” was used in the same purpose.

https://www.shotguns.se/html/belgium.html

Last edited by skeettx; 01/30/21 08:08 PM.

USAF RET 1971-95 [Linked Image from jpgbox.com]