The most valuable of uncommon quarters is a Bicentennial Quarter, which was sold for close to $65 million. This 1976-minted quarter is historical artifact in addition to a piece of currency.
Due to an uncommon minting error in which this quarter was struck twice, overlapping images are conspicuously apparent to the unaided eye.
Rarely observed, this 1976 Bicentennial Quarter was struck 15% off-center, which is a substantial deviation.
Assigning the 'S' mint mark to this quarter would have signified its fabrication at the San Francisco Mint.
The clarity and precision of the steps indicate the mint condition and scarcity of the coin.
Finally, the Rainbow Toned Quarter, which is renowned for its distinctive hue, is also appraised at more than $25 million.