George V (1910-36), silver proof Crown, 1935, Silver Jubilee 'Rocking Horse' issue, 'DECUS ANNO' edge legend error, bare head left with raised BM for engraver Bertram Mackennal on truncation, Latin legend and toothed border surrounding, GEORGIVS V. DG. BRITT: OMN: REX. FD. IND: IMP: rev. stylised St. George and dragon left, raised PM initials to lower right for engraver Percy Metcalfe, denomination and date above, error edge inscribed in raised letters, DECUS ANNO REGNI ET TUTAMEN. XXV. (Bull 3657; ESC 380; S.4050). An extremely rare error in any grade, this example amongst the finest known with coveted cameo contrast between fields and devices, graded by NGC as PF64 ULTRA CAMEO.