Watch List notes:

George IV (1820-30), Halfcrown, 1820, edge milled, 6h (Pywell-Phillips 496; ESC 2357 [628]; S.3807), dark tone with peripheral rainbow tone, a really good very fine, in NGC 'Minnesota' Holder, graded AU-Details ~ Cleaned (Cert. #5880393-016).

Estimate: £80 - £120