A wonderful 7mm pinfire 21-shot revolver by LeFaucheaux. The engineering on this pistol is marvelous! The cylinder indexes 1 – 1 – 1/2 -1 -1 -1/2 etc. so it fires two shots from the outer row of the cylinder through the top barrel and then fires one shot from the inner row through the bottom barrel for a continuous 21 shots. It must have been awesome circa 1860 to have such a capacity in your pistol.