This rifle has the seldom seen open top frame whereas the later Model 1876s had dust covers. Only around 3,000 were produced out of the total of 63,871 manufactured between 1876 and 1897. Per the serial number this Model 1876 was manufactured in 1876, the first year of production. The accompanying factory letter for this rifle confirms the octagon barrel and plain trigger as well as being received in the warehouse on October 26, 1877 and shipped the same day. The rifle is fitted with a dovetail blade front sight and an elevation adjustable rear sight. The top barrel flat has the two-line address/patent dates legend ahead of the rear sight. The rifle correctly lacks a caliber designation as early production Model 1876s were offered only in .45-75 WCF. The upper tang is marked "MODEL 1876." Other early features include the large hammer and buttplate with large toe. The buttstock is fitted with a trapdoor buttplate (cleaning rod not included).