Marked with the Second Model First Variation address "MANFD BY J.M. COOPER & CO / PITTSBURGH PA / PATD APL 25, 1854 / PATD JAN. 7, 1851 / REISSD JULY 26, 1859" on top of the barrel, only about 100 were made in this variation. Produced between 1864 and 1869 with a total production of 1,500, externally it bears a close resemblance to Colt's Model 1849 Pocket Navy revolver, but equipped for double action firing. Brass pin front sight, 5-round unfluted cylinder with conventional rectangular notches.