This lot of vintage U. S. Springfield Trapdoor 45-70 Carbine Rear Sight parts are Model 1877 types.  Included are a Rear Sight Base (marked "C"), Rear Sight Leaf (properly marked "6" thru "12"), front slide piece and rear slide piece.  All in very good to excellent condition (front slide piece has some surface rust).  Ship to U. S. address only.