Originally Posted By: Saskbooknut
PSF is difinative smokeless proof, since 1951.
PF with the crown on this gun, indicates final proof perhaps, not specifying smokeless. I find it hard to believe that this gun would only be proved for black though.


PSF has been an Italian proof ("smokeless powder definitive proof") since 1925. But from 1925-50, it was surmounted by a crown. The crown was changed to the current star in a circle after that.

PSF stands for "polvere senza fumo"--smokeless powder.