Since I collect US Military Long Arms, and this is about Original Trapdoors thought I would share some photos of the TD Rifles currently in my care.
They are from top to bottom in the first photo:
• SF Model 1865, 1st Allin Conversion, original barrel, made 1865, .58-60 RF
• SF Model 1866, 2nd Allin Conversion, sleeved barrel, .50-70
• SF Model 1868, Allin Conversion, new barrel, made 1869, .50-70
• SF Model 1870, Allin Conversion, new barrel, made 1870, .50-70
• SF Model 1873 early, made 1874, .45-70
• SF Model 1873 late (1877), made 1881, .45-70
• SF Model 1884, made 1888, .45-70
• SF Model 1888, round rod bayonet, made 1892, .45-70