What this coin looks like (obverse, reverse, mint mark location, special features, etc.): The bicentennial Washington quarter features a 1776-1976 date on the obverse and a colonial drummer on the reverse of the coin to celebrate the 200th anniversary of the United States of America. This coin was produced in both years of 1975 through 1976 so there were no 1975 coins.
This particular version is the special 40% silver Mint Edition of the Bicentennial Quarter. Proof silver coins with a mirror-like surface were produced as depicted in the image above. In addition: A business strike silver uncirculated edition of this coin was also produced (does not have the mirror-like surface). An example of the uncirculated 40% silver edition bicentennial quarter is depicted below in the example image:
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD