Elizabeth II, Decimal trial or pattern, undated uniface obverse strikings (4), by Arnold Machin, three on 2-Pence size flans, in silver, cupro nickel, and bronze, edge plain, one on 10-Pence size flan in cupro nickel, edge grained, weights 8.951g. 7.841g. 7.566g. and 11.292g. respectively, all as struck and of the highest rarity (4)