A Percussion Powder-Tester, By Westley Richards, London, Mid-19th Century

Of box-lock pistol form, with foliate engraved action signed over both sides, large indicator wheel with sprung release catch and internal return spring, numbered from '0' to '30' and made in one with an anvil fitting against the muzzle, foliate scroll engraved trigger-guard, finely chequered figured rounded butt, and vacant silver escutcheon (some light pitting)
17.5 cm.

Cf. A very similar example by the same maker sold in these Rooms, Fine Antique Arms and Armour, 27 November 2003, lot 120