David Williamson Single Shot Deringer. He was the inventor in New York City, and the deringer was made by Moore's Patent F.A. Co. and National F.A. Company, New York circa 1866-1870. 41 rimfire and also accepts an auxiliary / adapter percussion chamber. 2 1/2 inch barrel slides forward for loading. The barrel is blued and walnut stock with checkered grip.
Williamson Deringer
Williamson Deringer - Right Overall View
Williamson Deringer - Barrel Forward to Load
Williamson Deringer - Barrel Forward to Load
Williamson Deringer - Barrel Breech Detail
Williamson Deringer - Barrel Breech Detail
Williamson Deringer - Firing Pin and Breech Detail
Williamson Deringer - Barrel Ramp Detail
Williamson Deringer - Barrel Ramp Detail
Williamson Deringer - Barrel Markings and Patent Detail