Every circulating United States Bicentennial coin carried the double date 1776–1976.
The United States Mint created special circulating designs for the quarter, half dollar, and dollar to commemorate the nation’s 200th anniversary. Although the coins were struck in both 1975 and 1976, each carried the combined dates 1776–1976 rather than a single minting year.
The quarter featured a colonial drummer, the half dollar showed Independence Hall, and the dollar displayed the Liberty Bell superimposed on the Moon. The temporary reverse designs made the coins instantly recognizable during the Bicentennial period.
The date range is sometimes misunderstood as meaning that all the coins were minted only in 1976. In fact, production began in 1975, but the double date was used consistently to represent the two-century span from independence to the anniversary.