Royal Mint other manufacturers. The Trial of the Pyx is the procedure in the United Kingdom for ensuring that newly-minted coins conform to required standards. The trials have been held since the twelfth century, normally once per calendar year, and continue to the present day. The form of the ceremony has been essentially the same since 1282. They are trials in the full judicial sense, presided over by a judge with an expert jury of assayers. Since 1871, the trials have taken place at the Hall of the Worshipful Company of Goldsmiths, having previously taken place at the Palace of Westminster. Given
Coins of the Republic of Ireland committee did not know whose designs were being judged. Percy Metcalfe's designs were chosen and design modifications were added with assistance from civil servants at the Department of Agriculture. The first coins were struck in 1928 and were minted at the Royal Mint in London. In 1938, following the introduction of the Constitution of Ireland, the obverse of the coins was modified with the Irish language name of the State, "Éire", and the harp was also modified so that it wore better. The Central Bank Act, 1942 Section 58 allowed pure nickel to be substituted with a cupro-nickel alloy. The