Hello and WELCOME on your first posting

Here is the proof mark web site

http://www.shotguns.se/html/spain.html

The I1 makes it 1963 as year of proof

I feel, the letters and the diamond represent the manufactures code.

http://personales.jet.es/rafa/b_punzones_larga_lisa.html


Mike

p.s. for the rest of us smile see here

http://personales.jet.es/rafa/b_punzones.html

p.s.s. the manufactures code looks like an overstrike when the industry consolidated??????

Last edited by skeettx; 04/16/15 12:16 AM.
USAF RET 1971-95 [Linked Image from jpgbox.com]