Pattern Half-sovereign, 1816, by Thomas Wyon, large laureate bust right, struck in high relief, legend in small letters, GEORGIUS III DEI GRATIA, rev. shield in a crowned garter, BRITT: REX: FID: DEF:, edge plain, 4.0g. (Montagu 560; Murdoch 197; Nobleman 53; Douglas-Morris 133 [this coin]), characteristic die cracks on reverse, brilliant practically as struck, of the highest rarity thus