proofmark stamps

[knoet holgerson]

nice link a lot of proofmarkstamp.
Commission Internationale Permanente pour l' épreuve des armes à feu portatives (C.I.P.)
http://www.proefbankstempels.nl/landenpagina.html

 

[Craig L Barry]

See also Girnsberger's classic Dictionary of Proofs. I have a copy around here...some place.