Coins of the pound sterling chronologically. All genuine UK coins are produced by the Royal Mint. The same coinage is used across the United Kingdom: unlike banknotes, local issues of coins are not produced for different parts of the UK. The pound coin until 2016 was produced in regional designs, but these circulate equally in all parts of the UK (see UK designs, below). Every year, newly minted coins are checked for size, weight, and composition at a Trial of the Pyx. Essentially the same procedure has been used since the 13th century. Assaying is now done by the Worshipful Company of Goldsmiths on behalf
Coins of the rupiah have the Arabic removed, with "INDONESIA" replacing its Jawi equivalent for the second minting of the coin, dated 1955 (the 50 sen was also minted that year). Inflation meant that the smallest denomination to be minted after 1954 was the 10 sen, which likewise had Arabic removed from its reverse for its third minting, 1957; 25 and 50 sen coins were also minted in 1957. After 1957, the cupro-nickel 50 sen was debased to aluminium, the same metal as the lower denomination coins (which were never minted again). As a result of this, the 50 sen, previously the heaviest, but