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US Coin Sizes and Composition Steel Alloy Copper Copper Alloy Silver Alloy Silver Gold Platinum Palladium Three Cent 14 mm 0.8 g 0.750 fine 1851–1853 14 mm 0.75 g 0.900 fine 1854–1873 Half Dime 15.5 mm 1.24 g 1794–1873 Dollar 15 mm 1.67 gr 1849–1889 $5 American Gold Eagle 16.5 mm 3.11 g 1986–present $10 American Platinum Eagle 16.5 mm ...
Length (system unit unit-code symbol or abbrev. notes sample default conversion combination output units SI: megametre: Mm Mm US spelling: megameter 1.0 Mm (620 mi) kilometre
24.5 mm 1.85 mm 6.5 g Cupronickel (3:1) 1992 2.05 mm Nickel-plated steel 2012 Twenty pence: Crowned Tudor Rose 21.4 mm 1.7 mm 5 g Cupronickel (5:1) Smooth, Reuleaux heptagon: 1982 Segment of the Royal Arms 2008 Fifty pence [a] Britannia and lion 27.3 mm 1.78 mm 8 g Cupronickel (3:1) Smooth, Reuleaux heptagon 1997 Various commemorative designs
The first commemorative coin of the United States made specifically as a circulation issue was the 1921 Peace dollar. The coin was originally intended to be produced for one year to commemorate the end of World War I, although the design proved popular and continued to be produced until silver dollar production ended in 1935. [17]
This required new coins to be minted, to replace the pre-decimal ones. [10] [11] The original specification for the 1p coin was set out in the Decimal Currency Act 1969, which was replaced by the Currency Act 1971. Both mandated the weight of the coin to be 3.564 grams ±0.0750g, and 2.032 cm ±0.125 mm in diameter. [12]
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The Britannia is a bullion coin issued by the Royal Mint.It has been minted in gold since 1987, in silver since 1997, and in platinum since 2018. The reverse of the coin patterns feature various depictions of Britannia, a feminine personification of the United Kingdom, while the obverse features the effigy of the monarch of the United Kingdom with the legend around it.