Joseph Manton & Son 16 bore percussion hammer action shotgun with lock marked Jno Manton & Son

Joseph Manton & Son 16 bore percussion hammer action shotgun with lock marked 'Jno Manton & Son Patent' and engraved with bird scenes, engraved hammer, top plate, pineapple finialled trigger guard and mounts, chequered grip, vacant cartouche and teardrop to the wrist, metal tipped wooden ram-rod and 31.5 inch part octagonal smooth bored barrel engraved 'John Manton & Son Dover Street London', overall length 121cm, serial number 11689.