| 56-50 Spencer Rimfire |
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| The 56-50 Spencer Rimfire was used in the Spencer Model 1865 carbine, but it was designed by the Springfield Armory in late 1860. Evidence suggest that these specimens are C. D. Leet & Company, Springfield, Ma. from 1860 to 1864 production. They have 3 bullet crimps on the case sides and 2 tool marks on the base on the cartridge. |