Watch List notes:

George IV (1820-30), Proof Halfcrown, 1821, laureate head left, rev. crowned 'heavily' garnished shield, edge milled (Davies 172; ESC 2361 [R2] {632}; S.3807), slight cabinet friction to high points, a light tone across otherwise brilliant surfaces, good extremely fine.
provenance
Gray collection
Spink Numismatic Circular, August 2000, no. 3154
Estimate: £1000 - £1200