Watch List notes:

George III (1760-1820), 'New Coinage', Sixpence, 1820, 'Inverted 1', laureate head right, rev. crowned shield within Garter, milled edge, 2.81g, 12h (Bull 2208; Davies 107; ESC 1639A [R4]; Spink 3791), bright and lustrous, the inverted 1 error perfectly clear, extremely fine, very rare.

Estimate: £200 - £260