Proof marks

VSS

Well-Known Member
Can anyone please tell me whether the PT symbol on French proof marks, meaning "smokeless powder proofed", is equivalent to the English proof mark NP or BNP meaning "nitro proofed"?
Thanks.
 

VSS

Well-Known Member
Poudre T. Which, yes, is smokeless powder. Or what passed for smokeless is about 1900. Is it a direct equivalent...I don't know.
Thanks. I looked through a list of recognised French proof marks, and they don't seem to have one for "nitro proof". PT is the nearest thing, but not sure if it is the same?
 

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