Lt. Col Alexander Ross (1742-1827), aide to George III, didn’t use this set of handsome silver-mounted 28-bore flintlock pistols for combat. Presumably, he used other weaponry during engagements in India, Europe, and America, where he served as Aide-de-Camp to Cornwallis, a key British commander in the Revolutionary War. Instead, these pistols were meant for dueling. When Bonhams offers them on April 18th in its Antique Arms & Armour sale in London, they’re expected to realize $47,000-$62,700.A rare pair of 18th century silver flintlock holster pistols at the sale is expected to be even more valuable. What makes them possibly unique is their solid silver barrels and locks. Created in 1768 by master gunsmith Joseph Heylin of London, they’re expected to fetch $62,700-$94,000.