Proof marks

[CaptainKirk]

An excellent read, helped me identify who made my BP guns, and when:
http://www.powderhombre.com/mbpproofmarks.pdf

 

[Zonie]

I think the ole' "Powderhombre" kinda lifted that out of the, "Blue Book of Modern Black Powder Values".

It is a nice read and a handy reference but there are many Italian makers who had marks and identifications that it doesn't begin to cover.