Watch List notes:

Elizabeth II, proof crown, 1953, Coronation issue, equestrian portrait l., rev. crown in centre of emblematic cross, shield of arms in angles (S.4136; ESC.393E; Bull 4332), certified and graded by NGC as Proof 66 Ultra Cameo
Heavy frosting to both sides, a superior example.
NGC records 7 examples certified in this grade, only 5 are graded higher.
(300-400 GBP)