George III 1817 Half-Sovereign, first year of issue, once cleaned

George III (1760-1820), gold Half-Sovereign, 1817, engraved by Benedetto Pistrucci, laureate head right, date below, Latin legend GEORGIVS III DEI GRATIA, raised rim both sides,rev. crowned shield of arms, dot below, REX FID: DEF: BRITANNIARUM, (Hill 400; Bull EGC 928; S.3786).Once cleaned, now toned about extremely fine, has been graded by NGC as AU details cleaned.