Washington quarters dated 1965 to date are clad coinage with an outer layer of 75% copper and 25% nickel and an inner core of pure copper. They weigh 5.67 grams with a diameter of 24.3 mm and a reeded edge.
Bicentennial Quarter (1976) - The Bicentennial Quarter commemorates the 200th anniversary of the independence of the United States. Actual minting of the Bicentennial coins occured in both 1975 and 1976, however since all coins bear a dual date of 1776-1976, it is impossible to tell which coins were minted in 1975.