3 coins, one 1776-1976 Bicentennial Error Quarter with a filled mint mark from the Denver Mint, one with D mint regular mark and one that has no mint mark. These coins are circulated silver Washington Quarters with a business strike type. It is a unique variety coin with a missing mint mark on the obverse, making it a valuable addition to any coin collection or error coin enthusiast's portfolio. This error coin was minted in the United States and is uncertified, adding to its rarity and appeal among collectors. Please see scans.