The 1976-D Clad Bicentennial Quarter is a one year type. It has a Colonial Drummer. In early wars from the 1700-1800's young boys were used as drummer boys to help signal men in the battlefield. Some young boys enlisted voluntarily to become a battlefield drummer. Drummer boys were admired by other young kids as being brave and courageous. It is believed that some drummer boys were as young as 7 years old. There is an account of a 12 year drummer boy being killed in the American Civil War.
The design on the 1976 Bicentennial Quarter reminds us of the young boys who grew up in the midst of these battles. Many of these quarters were pulled from circulation as they had a different reverse design that it made them appealing to the public. So, it is very difficult to find them in circulation despite them being minted by the hundreds of millions.
Coins in MS66 condition are scarce. In MS67 they are a little scarcer with many hundreds of if not thousands still out there. In Ms68 condition they are truly scarce with less than a dozen known and none being graded higher.