Derringer Philadelphia pistol, USA 1850, 17cm

Baby Philadelphia Deringer pistol, USA 1850.

The Philadelphia Deringer was a small percussion handgun designed by Henry Deringer (1786–1868) and produced from 1852 through 1868. A popular concealed carry handgun of the era, this pocket pistol design was widely copied by competitors, sometimes down to the markings.

For loading a Philadelphia Deringer, one would typically fire a couple of percussion caps on the handgun, to dry out any residual moisture contained in the tube or at the base of the barrel, to prevent a subsequent misfire. One would then remove the remains of the last fired percussion cap and place the handgun on its half-cock notch, pour 15 to 25 grains of black powder down the barrel, followed by ramming a patched lead ball down onto the powder, being very careful to leave no air gap between the patched ball and the powder, to prevent the handgun from exploding when used. (The purpose of the patch on the ball was to keep the ball firmly lodged against the powder, to avoid creating what was called a "short start" when the ball was dislodged from being firmly against the powder.)