This model is not clearly understood and many believe they were actually made from converted Model 1865 pistols in the early 1870s. This transitional example does not have the "anchor" Navy inspection mark on the barrel at the breech, inspection initials or an inspection cartouche on the grip as typically seen on the Navy issued examples, and also differs from them in that it has an 8 1/2 inch barrel as opposed to the Navy pistols with a 7 inch barrel. These transitional pistols were sold commercially for civilian use. The left side of the frame is marked with the two-line patent information, the barrel has a pinched blade front sight, with a notch rear sight integral to the breech block, and the underside of the barrel has had its markings removed.