George III (1760-1820), A silvered brass ashtray, in the centre an impression of the George III Pattern Dollar, with bust facing left, legend around “Impression from a die made by Matthew Boulton at Soho 1804 and used to convert silver Dollars captured by the English in the Spanish War, the image of Carolus III being thus defaced”, 117mm (cf BDW 4, 332* for a similar unsilvered example). Reverse stamped “Avery”, fine and rare