George III 1817 Half-Sovereign, first year of issue

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, weight 3.99g (Hill 400; Bull EGC 928; MCE.467; S.3786). Once cleaned, now lightly toned with multiple hairlines, otherwise extremely fine.