Watch List notes:

BRITISH COINS, George III, Uniface Incuse Retrograde Lead Trial Striking for the obverse of the Half-Sovereign, 1817, laureate head incuse left, date incuse below, retrograde legend incuse GEORGIUS III DEI GRATIA, rev blank with "1" scratched upon it, struck in a plain collar on a 23mm circular flan, 6.43g (cf S 3786). As struck with brilliance to outer sunken rim, some patchy tone, otherwise extremely fine and unusual.

Estimate: £200-300