George VI 1937 proof Sixpence PF65 Coronation issue

George VI (1936-52),proof Sixpence, 1937, struck in 0.500 silver, bare head left, tiny HP below truncation for engraver T. Humphrey Paget, Latin legend and toothed border surrounding, GEORGIVS VI D: G: BR: OMN: REX, rev.struck en medaille, crowned GRI, K G below for engraver Kruger Gray, date either side, denomination below, Latin legend and toothed border surrounding, FID. DEF. .IND. IMP, edge milled, (Bull 4219; ESC 1827; S.4084).Practically as struck, some toning, has been slabbed and graded by NGC as PF65.