The Half Eagle is a United States coin that was produced for circulation from 1795 to 1929 and in commemorative and bullion coins since the 1980s. Composed almost entirely of gold, it has a face value of five dollars. Its production was authorized by The Act of April 2, 1792, and it was the first gold coin minted by the United States.
The design and composition of the half eagle changed many times over the years, but it was originally designed by Robert Scot. At this time the coin contained .9167 gold and .0833 copper and silver. It had a diameter of approximately 25 mm (0.98 in), a weight of 8.75 grams, and a reeded edge. The obverse design, or "Turban Head", depicted a capped portrait of Liberty facing to the right. The reverse depicted a small eagle. This type was produced from 1795 to 1798. Simultaneously, another type was minted that depicted a larger heraldic eagle on the reverse with the inscription "E PLURIBUS UNUM". This type was produced through 1807.
From 1807 to 1812, a new type designed by John Reich was produced, the "Draped Bust" (also referred to as the "Capped Bust"), featuring a round-capped Liberty facing left on the obverse and a modified eagle on the reverse. For the first time, the value "5 D." was placed on the reverse of the coin to indicate its value. In 1813 a modified version of the Draped Bust was introduced, removing much of the bustline ("Capped Head") and giving Liberty an overall larger appearance. This design which would last through 1834. Another modification occurred in 1829 when the diameter of the coin was reduced slightly to 23.8 mm, although the overall design remained unchanged.
By 1834, the gold in the half eagle had been worth more than its face value for several years. The Act of June 28, 1834 called for a reduction in the gold used. The weight of the coin was reduced to 8.36 grams, the diameter reduced to 22.5 mm, and the composition changed to .8992 gold and .1008 silver and copper. A new obverse, the "Classic Head", was created by William Kneass for the altered coin. The reverse still depicted the modified eagle introduced in 1813, but "E PLURIBUS UNUM" was removed to distinguish further the new composition. In 1837, the gold content of this type was increased to .900 in accordance with the Act of January 18, 1837.