Struck in 40% silver, these proof coins are rare and highly valued, especially in perfect condition.
Features significant doubling on the obverse, a rare error that increases its value.
Philadelphia-minted quarters without a mintmark can be valuable, particularly in high grades.
Uncirculated silver versions are rare and sought after, especially in pristine condition.
High-grade examples from the Denver Mint are worth more, particularly those in mint state condition.
Features doubling on the reverse, making it a rare and valuable error coin.
Quarters with errors in the clad layers or striking process can be exceptionally valuable.