A Scottish percussion belt pistol by Alexander Thomson, Edinburgh, circa 1835, 44-bore, engraved 'Alex'r Thompson (sic) Edinburgh' to the top flat of the octagonal 4 1/4" barrel with rear and foresight, with belt hook to one side and a captive ramrod beneath, London proof marks, foliate engraving to the frame, the chequered grip featuring oval escutcheon engraved 'W. Campbell', a cap to the grip for housing percussion caps, overall length 8"

Alexander Thomson established his business in 1820 at 3 Drummond Street, Edinburgh and was appointed "Gunmaker to His Majesty" (King George IV) in 1828. George Thomson (possibly the father of Alexander) established his business as a gun lock maker in 1819 at 4 Arthur Place, Edinburgh. In 1822, he moved to 16 Union Place as a gunmaker. In 1828 he too was appointed "Gunmaker to His Majesty" (King George IV). George retired or died in 1832, and Alexander took over the business and the premises at 16 Union Place. In 1840/1841, additional premises were taken at 3 South St Andrew Street. In 1869, the firm's name changed to Alexander Thomson & Son, and they moved to 95 Princes Street. In 1876, they moved to 3 Hanover Street before closing about 1881. His name is variously spelt 'Thomson / Thompson' in Edinburgh trade directories.