The Washington quarter is the present quarter dollar or 25-cent piece issued by the United States Mint. The coin was first struck in 1932; the original version was designed by sculptor John Flanagan. The new silver quarters entered circulation on August 1, 1932; they were struck in that metal until the Mint transitioned to copper-nickel clad coinage in 1965. A special reverse commemorating the United States Bicentennial was used in 1975 and 1976, with all pieces bearing the double date 1776–1976; there are no 1975-dated quarters. Since 1999, the original eagle reverse has not been used; instead that side of the quarter has commemorated the 50 states, the nation's other jurisdictions, and National Park Service sites—the last as part of the ongoing America the Beautiful Quarters series, whic