Final answer:
If a 1776-1976 quarter has no mint mark, it was minted in Philadelphia. These quarters were created to commemorate the 200th anniversary of the United States and feature a unique design on the reverse side. The absence of a mint mark does not impact its value.
Step-by-step explanation:
If a 1776-1976 quarter does not have a mint mark, it means that the coin was minted in Philadelphia. During this period, the Philadelphia Mint was the only facility producing the Bicentennial quarters, and they did not include a mint mark on these coins.
Bicentennial quarters were created to commemorate the 200th anniversary of the United States. They feature a special design on the reverse side, which includes a colonial drummer and a torch. The absence of a mint mark does not affect the value of the coin, but it is a distinguishing characteristic.
Learn more about 1776-1976 quarter mint mark