An English double barreled tap action 62 bore flintlock pistol

An English double barreled tap action 62 bore flintlock pistol, superposed turn off barrels 3.5 in., Ordnance private proof marks, well engraved box lock with trophies of arms and with retailer's details within ovals: 'R. CLARKE & SON'/ 'NO 62 CHEAPSIDE LONDON', sliding safety bar, flat sided wooden grip inlaid with scrolling silver wires terminating in finely engraved flowers, leaves and grapes, and with a vacant silver escutcheon, late 18th/early 19th century.