This rifle appears on page 229 of "The Muzzle-Loading Cap Lock Rifle" by Roberts and is identified as made by John Shell (1790-1875) of Shellsville, Pennsylvania. Features a star pattern on the muzzle, brass blade and notch sights, "J SHELL" directly behind the rear sight, "SD" further back, unmarked lock, "tear drop" lock screw washer, double set triggers, brass furniture, and a smooth walnut stock.