Thomas Horsley & Sons (York) 12g hammer shotgun, 30 inch double barrel, side by side ejector with cammed side/underlever opening, the rib engraved 'Made of Sir Joseph Whitworth's fluid pressed steel'. Thomas Horsley was the inventor of the breech loading action under several patents. Black walnut stock with chequered grip and forend. With leather case. SN3025. Licence required.