The 1976 Bicentennial was minted between 1975 and 1976, Bicentennial ámeans 200th year anniversary. And the United states declared independence in 1776. And the reason why there is no 1975 Quarter was because they minted the Bicentennial quarter in that time. And the U.S. Mint did not want the 1975 quarter to be a potential rare date. In 1973 The U.S. Mint held a contest for the design and the winner would receive 5000 dollars. The winner was Jack L. Ahr and created the reverse which has a military drummer and 13 stars representing the colonies. And the core of the quarter was pure copper.