George IV (1820-1830), Proof Sixpence, 1821, edge grained, 2.82g/6h (ESC 2423; S 3813). Clea...

George IV (1820-1830), Proof Sixpence, 1821, edge grained, 2.82g/6h (ESC 2423; S 3813). Cleaned at one time and now re-toned, otherwise good extremely fine £600-£800