Trial of the Pyx been properly minted. Criteria are given for diameter, chemical composition and weight for each class of coinage. Statutory basis for the Trial of the Pyx is given by the Coinage Act 1971, the latest in a long series of similarly named Acts of Parliament. Specific procedures are established by Order in Council, the most recent being the Trial of the Pyx Order 1998, which was amended in 2005, 2012 and 2016. It is "not" required for a new Order to be issued for each Trial: this is mandated (to occur) only with regulatory revision. Trial of the Pyx The Trial
Coins of the pound sterling coins was reduced from 92.5% to 50%, with some of the remainder consisting of manganese, which caused the coins to tarnish to a very dark colour after they had been in circulation for long. Silver was eliminated altogether in 1947, except for Maundy coinage, which returned to the pre-1920 92.5% silver composition. The 1816 weight/value ratio and size system survived the debasement of silver in 1920, and the adoption of token coins of cupronickel in 1947. It even persisted after decimalisation for those coins which had equivalents and continued to be minted with their values in new pence. The UK