Manufactured in 1878. This rifle has the scarce First Model receiver without any provisions for the dust cover, thus giving the name open top. Dust covers started to appear around serial number 1600, usually only on special orders by the customer and later, by serial number 3200 they were a regular feature on the rifle. With this late of a serial number, this was probably a special order that requested it not be fitted with the dust cover. The rifle is equipped with a dovetail blade front sight and an "1876" marked folding ladder rear sight. The top barrel flat is stamped with the two-line address/patent dates marking ahead of the rear sight. The rifle correctly lacks a caliber marking. The upper tang is marked "MODEL 1876." The buttstock has a trapdoor crescent buttplate. Comes with a four piece cleaning rod.