George IV (1820-1830), Chantreys Halfcrown, 1825, Type 3, bare head left, rev. crowned and garnished shield, edge milled, 14.13g, 6h (ESC 642; Bull 2371; Spink 3809), some light cabinet friction to otherwise quite brilliant fields, accentuated further still by partial portrait cameo frosting, good extremely fine, rare in this exemplary grade