George VI 1937 proof Shilling Scottish reverse PF64+ Coronation issue

George VI (1936-52),proof Shilling, 1937, struck in 0.500 silver with Scottish reverse, 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, lion seated on hind legs facing on imperial crown, holding sword and lis headed sceptre, crown with ermine interior, K and G either side under each handle for engraver Kruger Gray, date either side, 19 over Scottish shield, 37 over thistle, denomination below, Latin legend and toothed border surrounding, FID: DEF. IND: IMP, edge milled (Bull 4150; ESC 1453; S.4083).Practically as struck, some toning, has been slabbed and graded by NGC as PF64+.