16 bore, 32″ twist steel barrels, stepped at 22 1/2″ from the muzzle and intended for ball as well as shot. The barrel legend reads “JOSEPH MANTON & SON, 6 HOLLES STREET, CAVENDISH SQUARE, LONDON”. Serial number 10651 and listed in the Manton book with a full description including the stepped barrel. Cased in a magnificent pigskin lined oak box by John Dickson & Son’s for Charles Gordon around 1880. It is in mint condition with all of the accessories that include both shot flask and mold.