Trial of the Pyx Trial of the Pyx The Trial of the Pyx () is the procedure in the United Kingdom for ensuring that newly minted coins conform to the required standards. These trials have been held from the twelfth century to the present day, normally once per calendar year. The form of the ceremony has been essentially the same since 1282 AD. These events are trials in the full judicial sense, presided over by a judge with an expert jury of metallurgical assayers. Given modern production methods, it is unlikely that coins would not conform, but this has been a problem in the
Coins of the Canadian dollar to the $1 and $2 coins as well. The 50¢ piece is regularly minted, but not in large quantities; it is very rare to come across this coin in circulation, although an unsuccessful attempt was made by the Mint to promote the use of the coin when a special edition was released in 2002 marking the 50th anniversary of Elizabeth II ascending the throne. Coins issued in 2002 do not have the usual mint date, which normally appears on the reverse side. Instead, the 2002 coins have a commemorative double-date on the obverse side: "1952-2002", to commemorate the 50th anniversary