The first (one) coin is a 50 cent piece, and the second coin is a nickel. Thanks for using AnswerParty!
Coins of the United States
Australian five-cent coin
Coins of the United States dollar were first minted in 1792. New coins have been produced annually since then and they make up a valuable aspect of the United States currency system. Today, circulating coins exist in denominations of 1¢ (i.e. 1 cent or $0.01), 5¢, 10¢, 25¢, 50¢, and $1.00. Also minted are bullion (including gold, silver and platinum) and commemorative coins. All of these are produced by the United States Mint. The coins are then sold to Federal Reserve Banks which in turn are responsible for putting coins into circulation and withdrawing them as demanded by the country's economy.
The Australian five-cent coin was the third-smallest denomination coin of the decimal Australian dollar introduced in 1966. Since the demonetisation of the one and two cent coins in 1992 it has been the lowest-denomination coin in the country.
The coin was introduced into circulation on 14 February 1966. In its first year of minting, 30 million were struck at the British Royal Mint (then in London) in addition to 45.4 million at the Royal Australian Mint in Canberra. Since then, the coin has been produced exclusively at Canberra, apart from in 1981. In that year, 50.3 million were produced at the Royal Mint's new headquarters in Llantrisant, Wales; as well as 50 million from the Royal Canadian Mint in Winnipeg in addition to 62 million from Canberra although the 5 cent coin can not buy much. The reverse side depicts an Echidna and the obverse side the head of state, Queen Elizabeth II.
Liberty Head nickel
The Shield nickel was the first United States five-cent piece to be made out of copper-nickel, the same alloy of which American nickels are struck today. Designed by James B. Longacre, the coin was issued from 1866 until 1883, when it was replaced by the Liberty Head nickel. The coin takes its name from the motif on its obverse, and was the first five-cent coin referred to as a "nickel"—silver pieces of that denomination had been known as half dimes.
Silver half dimes had been struck from the early days of the United States Mint in the late 18th century. Those disappeared from circulation, along with most other coins, in the economic turmoil of the Civil War. In 1864, the Mint successfully introduced low-denomination coins, whose intrinsic worth did not approach their face value. Industrialist Joseph Wharton advocated coins containing nickel—a metal in which he had significant financial interests. When the Mint proposed a copper-nickel five-cent piece, Congress required that the coin be heavier than the Mint had suggested, allowing Wharton to sell more of the metal to the government.
The Liberty Head nickel, sometimes referred to as the V nickel because of its reverse (or tails) design, was an American five-cent piece. It was struck for circulation from 1883 until 1912, with at least five pieces being surreptitiously struck dated 1913.
The original copper–nickel five-cent piece, the Shield nickel, had longstanding production problems, and in the early 1880s, the United States Mint was looking to replace it. Mint Chief Engraver Charles Barber was instructed to prepare designs for proposed one-, three-, and five-cent pieces, which were to bear similar designs. Only the new five-cent piece was approved, and went into production in 1883. For almost thirty years large quantities of coin of this design were produced to meet commercial demand, especially as coin-operated machines became increasingly popular.
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