Please refresh my memory.On a 1912-39 German long gun Nitro in block = proofed in Suhl ???
Nitro in script=proofed in Z-M ???
I think. Am I correct?
Just another senior moment! Thanks.
Mike

Indeed. There is the off chance that block Nitro might apply to the facility at Frankfurt/Teschner-Collath, but still the post 1912 applies.

Kind Regards,

Raimey
rse

Thank you kind sir for refreshing my memory!

That would be Frankfurt am Oder, not the more familiar Frankfurt am Main.
Mike

Yes, Frankfurt an der Oder adjacent to the West border of Poland.

Kind Regards,

Raimey
rse