Paranumismatica, Enamelled coin jewellery, George III (1760-1820), halfcrowns (3), 1816, armorial reverse enamelled in 5 colours, legend on royal blue, brooch-mounted; second type (2), armorial reverse enamelled, in 6 colours, legend lettering and background silver; and 1817, 7 colours, legend on royal blue, all brooch-mounted, extremely fine (3)