The origional proof marks on the barrel flats confirm that the gun is black powder proof and was made after 1887. The diamond stamp inside of which is the symbol, 12/C,[also introduced in 1888],means that at the time of the origional proof test, the barrels had 2 1/2 chambers.The engraved,"2 3/4 chambers",on the barrels suggests that the chambers have been lengthened. There is however, no government proof mark to indicate that the gun was ever submitted for reproof.This being the case the gun is technically out of proof.

Roy Hebbes