The US quarter dollar coin has been in circulation since 1796. It was first designed by Robert Scot and was made of silver. The obverse side of the coin features a portrait of George Washington, the first President of the United States. The reverse side of the coin features an eagle with a shield on its chest. The US quarter dollar coin has gone through many changes over the years. In 1965, the US Mint began producing the quarter dollar coin with a copper-nickel alloy. This was done to reduce the cost of producing the coin. In 1999, the US Mint began producing the 50 State Quarters Program. This program featured a different design on the reverse side of the coin for each of the 50 states. The US quarter dollar coin is still in circulation today and is worth 25 cents. It is a popular coin for collectors due to its long history and interesting designs. The value of the coin can vary depending on its condition and rarity. Some rare coins can be worth hundreds or even thousands of dollars. The US quarter dollar coin is an interesting and valuable coin. It has a long history and many interesting designs. Whether you are a collector or just looking for a piece of history, the US quarter dollar coin is a great choice.