U.S. JOSLYN BREECH LOADING RIFLE Description
.50-60-450 rimfire or .56-50 Spencer rimfire cal., lock is an altered 1863 Springfield and marked with an eagle, "U.S." , "Springfield " and "1864". Also marked "Joslyn Fire Arms Co, single shot breech loader, left pivoting breech block "B.F. Joslyn's Patent October 1862", 35 1/2 in. rifled barrel with three bands, walnut stock designed specifically for this gun. Mfg. January to June 1865. RF=2.
This model is similar to the Joslyn Fire Arms Co. Model 1864 Carbine.