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These half sovereigns were only issued in very small numbers. [11] In 1604, James I reduced the weight of gold coinage, and renamed sovereigns and half sovereigns as unites and half unites, in honour of his uniting the two kingdoms on the island of Great Britain. [12] The renamed half sovereign was thereafter replaced by the half guinea. [7]
Sovereign of Queen Mary I, c. 1553. There had been an English coin known as the sovereign, first authorised by Henry VII in 1489. It had a diameter of 42 millimetres (1.7 in), and weighed 15.55 grams (0.500 troy ounces), twice the weight of the existing gold coin, the ryal.
The Royal Mint continues to produce sovereigns, as well as quarter sovereigns (introduced in 2009), half sovereigns, double sovereigns and quintuple sovereigns. Between 1987 and 2012 a series of bullion coins, the Britannia , was issued, containing 1 troy ounce (31.1 g), 1 ⁄ 2 ounce, 1 ⁄ 4 ounce and 1 ⁄ 10 ounce of fine gold at a ...
It had a diameter of 42 millimetres (1.7 in), and weighed 15.55 grams (0.500 oz t), twice the weight of the existing gold coin, the ryal. The new coin was struck in response to a large influx of gold into Europe from West Africa in the 1480s, and Henry at first called it the double ryal, but soon changed the name to sovereign. [2]
The first guinea was produced on 6 February 1663 (362 years ago) (); a proclamation of 27 March 1663 made the coins legal currency.One troy pound of 11 ⁄ 12 (0.9133) [citation needed] fine gold (22 carat or 0.9167 pure by weight) would make 44 + 1 ⁄ 2 guineas, [5] each thus theoretically weighing 129.438 grains (8.385 grams crown gold, 7.688 grams fine gold, or 0.247191011 ozt (troy ounces ...
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The half guineas of George III weighed 4.2 grams and were 20 millimetres in diameter except from 1787 when they were 20-21 millimetres in diameter. They were issued with seven different obverses and three reverses in 1762-1766, 1768, 1769, 1772–1779, 1781, 1783–1798, 1800–1806, 1808–1811 and 1813.
14 Thaler standard (16.7 grams) 18 1 ⁄ 2 Thaler standard (12.6 grams) 24, later 24 1 ⁄ 2 Gulden standard (9.5 grams of silver per Gulden) 34 Mark standard (6.9 grams of silver per Mark). The weight shown was the fine silver content in each case. This meant that the total weight of these coins could be higher due to the addition, especially ...