1960-D Quarter doubled die reverse.
- This error is characterized by a doubling of the design elements on the reverse of the coin, including the words "United States of America," "In God We Trust," and the quarter eagle.
- The doubling is most noticeable on the letters "L" and "I" in "Liberty" and the "T" in "Trust."
1968-S Quarter broadstrike.
- This error occurred when a quarter was struck off-center, resulting in a wider-than-normal coin.
- Broadstruck coins are often flattened and have a "mushy" appearance.
- This error is particularly rare, as it is estimated that fewer than 100 broadstruck quarters were produced in 1968.
1976 Quarter doubled die obverse
- This error is characterized by a doubling of the design elements on the obverse of the coin, including the date, the words "Liberty" and "In God We Trust," and the portrait of George Washington.
- The doubling is most noticeable on the letters "E" and "R" in "Liberty," the "T" in "Trust," and the "N" in "1976."
- This error is relatively common, and it is estimated that several thousand doubled die obverse quarters were produced in 1976.