George VI 1937 proof Halfcrown PF65+ Coronation issue

George VI (1936-52),proof Halfcrown, 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, quartered shield of arms with suspension above, crowned interlinked Gs either side, K beneath left side of shield, G below right side for engraver Kruger Gray, denomination and date below, Latin legend and toothed border surrounding, FID: DEF: : IND: IMP, edge milled (Bull 4035; ESC 787; S.4080).Practically as struck, has been slabbed and graded by NGC as PF65+.