Watch List notes:

The Hardcastle Collection | PROOF 65 RED-BROWN CAMEO | George III (1760-1820), Proof Halfpenny, 1806, in copper, 'Late Soho', laureate and draped bust right, rev. Britannia seated left, edge obliquely grained, 9.33g, 12h (Peck unlisted; cf. 1366; S.3781), a wonderful proof with mirror-like surfaces framing a cameo portrait, choice mint state, in NGC holder, graded PF65 RBC (Cert. #5878624-015).

Estimate: £300 - £400