The United States Mint produced a quarter, half dollar, and dollar as part of the circulating commemorative currency known as the United States Bicentennial coinage between 1975 and 1976
The Washington quarter, Kennedy half dollar, and Eisenhower dollar all feature the double date 1776–1976 on their regular obverses, regardless of when they were minted.
None of the three denominations of coins with a 1975 date were produced.
Beginning in the 1950s, the Mint argued against the issuance of commemorative coins due to past systemic abuses.
Congressmen started introducing measures in 1971 to authorize coins to commemorate the United States Bicentennial, which was scheduled for 1976.
The Mint, represented by director Mary Brooks, first rejected these ideas but subsequently came around to them, and Congress enacted laws mandating the temporary redesign of the quarter, half dollar, and dollar reverses.
The designs of a Colonial drummer for the quarter, Independence Hall for the half dollar, and the Liberty Bell overlaid on the moon for the dollar were the product of a statewide competition.
Given their striking quantities, all three coins are still widely used today. 45,000,000 part-silver pieces were required to be minted for collectors by Congress in addition to the copper nickel circulation pieces.
The part-silver coins were taken out of circulation in 1986, and the Mint sold more than half of them before melting the rest.