Look for a 1776-1976 date on the quarter's obverse side. Check for a double die error on the date, visible as a slight doubling effect.
Inspect the reverse side for a distinctive design featuring a drummer boy. Look for any unusual markings or errors on this side.
Examine the edge of the quarter for a copper band. Rare 1976 Bicentennial Quarters have a copper layer between the nickel layers.
Check for a mint mark on the quarter. Quarters minted in Philadelphia have no mint mark, while those from Denver have a 'D' mark.
Consult a coin expert or use a magnifying glass to look for any other unique characteristics that indicate a rare 1976 Bicentennial Quarter.
By following these steps, you can identify a rare 1976 Bicentennial Quarter. Remember to handle collectible coins with care and store them properly.