Rare U.S. Coin Errors: The term “Ghost Mintmark” refers to U.S. coins—especially Proof coins like the 1981-S or 1990-S American Eagles—where the mintmark is faint, missing, or completely absent.
‘No-S’ Varieties: These occur when the mintmark punch was accidentally left off the proof die. Examples include the 1971-S Jefferson Nickel and 1990-S Lincoln Cent, where no “S” appears on San Francisco-minted proofs.
‘Phantom’ Mintmarks: These are mintmarks that appear faint or blurry—sometimes due to overpolishing of dies or worn die states. They can appear ghost-like under magnification.
Most Famous Examples: The 1990-S No-S Lincoln Cent is perhaps the most famous example. It was struck in proof without the “S” and only around 200 are known.
Collector Appeal: Ghost and No-S coins are highly collectible because they represent errors in a process that is usually precise—especially with Proof coins.
Authentication is Key: These coins are often faked. Reputable certification from PCGS or NGC is essential before purchasing or selling.
Value Potential: Depending on rarity and demand, Ghost or No-S coins can fetch thousands of dollars. A 1990-S No-S Cent in PR69DCAM has sold for over $20,000.
Minting Process Glitch: Ghost mintmarks often happen when dies are overpolished or improperly prepared—removing or dulling the tiny mintmark.