Manufactured c. 1870s-1880s. Features a floating rimfire firing pin, blade front sight and notch rear sight, "FRANK WESSON WORCESTER, MASS./PAT'D OCT 25 1859 & NOV. 11 1862" marked on top of the octagon barrel, and numbered "20" on the lower tang. Absent tang peep sight.

Exceptionally fine, retains 95% original blue finish, 98% original nickel finish, with some light handling marks, a few small dings, and sharp markings and edges in the metal overall. Stock is fine with defined edges, scattered light scratches and dents, and a crack ahead of the left of the buttplate. Mechanically excellent.