A Fantastic American Revolutionary War Period Cased Pair of English Silver Mounted Box-Lock Flintlock Cannon Barrel Pistols by GRIFFIN, LONDON

A Fantastic American Revolutionary War Period Cased Pair of English Silver Mounted Box-Lock Flintlock Cannon Barrel Pistols by GRIFFIN, LONDON, c. 18th century. The pistols date prior to 1765 based on the swan neck style/form of the cocks and have 5", .58 cal. round steel multi-stage smooth bore "turn-off" barrels with cannon muzzles and numbered "1 & 2" to each frame chamber.  The box-lock frames have decorative engraving on both sides surrounding "GRIFFIN" on the left and the makers address "BOND STREET, LONDON" on the right.  All steel surfaces exhibit areas of salt & pepper rust pitting.  The bottom of each frame is stamped with (2) oval "PROOF" and "VIEW" marks with an unidentified mark in-between.  Each pistol has decoratively engraved steel barrel tangs.  Classic Georgian period sterling silver repoussé hallmarked grotesque face butt caps, and wrist escutcheons depicting a scallop shell over an unidentified engraved family crest of a "unicorn bust over a crown" over a mo