Great Britain 1937 Silver Sixpence 6d Toned PR64 PCGS S-4084, KM-852. Obv. Bare head of George VI. Rev. GRI (GEORGIUS REX IMPERATOR; George, King and Emperor) cipher crowned, struck on coin axis. Lovely teal patina and again, conservatively graded. A first-year proof of this type, struck in 0.500 silver. The proof mintage was a scant 26,000 pieces.