Watch List notes:

George IV (1820-30), Proof Halfcrown, 1826, bare head left, rev. crowned shield and motto, edge milled (ESC 2376 {647}; S.3809), cabinet friction to high points, otherwise tone overlying brilliant surfaces, a pleasing extremely fine.
provenance
Gray collection
Spink Numismatic Circular, August 2002, MS2984
Estimate: £800 - £1000