2007-d washington quarter, 2018, Classic Coins, Coin Articles, Coin Design, Coin Discoveries, Coin Grading, Columns, Key Dates & Rarities, mint cancelling, NGC, Numismatic Guaranty Corporation, Press Releases, Sacagawea Dollar, U.S. Coin Collecting News, United States Mint, US Coins, US Mint Products of the Past, waffle coin NGC certifies unique “Mint cancelled” error coin July 19, 2018 Press Release Leave a comment This 2007-D Washington quarter was originally struck on a Sacagawea $1 planchet before being cancelled by the U.S Continue reading on Coin Update News