Expert guides to identifying valuable minting errors. Learn what to look for, how to check, and what your coins could be worth.
Scan Your Coin NowThe 1979 Susan B. Anthony dollar was the first small-size dollar coin minted by the United States. Due to production iss...
Half DollarsKennedy half dollars have been minted since 1964 and are one of the most collected US coin series. Numerous minting erro...
Half DollarsThe 1964 Kennedy half dollar is the only year struck in 90% silver, making it both a bullion coin and a collector favori...
Half DollarsThe 1974 Kennedy half dollar is known for a significant doubled die reverse variety that is one of the strongest doubled...
Half DollarsThe 1976 Bicentennial Kennedy half dollar features a special reverse design with Independence Hall. The dual-dated 1776-...
PenniesWheat pennies (Lincoln wheat cents) were minted from 1909 to 1958 and are among the most popular US coins to search for ...
PenniesLincoln Memorial pennies were minted from 1959 to 2008 and are still commonly found in circulation. Many error varieties...
QuartersThe 1976 Bicentennial quarter features the colonial drummer design on the reverse and the dual date 1776-1976. Billions ...
QuartersThe 50 State Quarters program (1999-2008) produced billions of coins across 50 unique designs. The massive production vo...
NickelsJefferson nickels have been minted since 1938 and contain several key error varieties. The 1939-1964 era is particularly...
DimesRoosevelt dimes have been struck since 1946. Silver versions (1946-1964) and clad versions (1965-present) both contain n...
Error Type GuidesA doubled die is one of the most sought-after coin errors. It occurs during the die-making process when the hub impresse...
Error Type GuidesAn off-center strike occurs when the coin blank (planchet) is not properly seated in the collar before the dies come tog...
Error Type GuidesDie cracks and cuds are among the most common mint errors. They occur when a coin die develops cracks from stress and fa...
Error Type GuidesA clipped planchet error occurs when the coin blank (planchet) is not properly cut from the metal strip, resulting in a ...
PenniesThe 1955 doubled die Lincoln cent is the most famous error coin in American numismatics. The dramatic doubling on the ob...
PenniesThe Close AM and Wide AM varieties are among the most exciting modern Lincoln cent finds. The spacing between the A and ...
DollarsMorgan silver dollars (1878-1921) are among the most collected US coins. Their large size and high relief make errors ea...
DollarsSacagawea dollars (2000-present) launched with massive production and several notable errors. The most famous is the 200...
NickelsBuffalo nickels (1913-1938) are beloved for their iconic American design. The high-relief design led to rapid die wear, ...
DimesMercury dimes (1916-1945) are among the most beautiful US coin designs. Several key dates and error varieties make them ...
Half DollarsWalking Liberty half dollars (1916-1947) are considered one of the most beautiful US coin designs. The high relief and c...
DollarsEisenhower dollars (1971-1978) are the last large-size dollar coins. Both clad and 40% silver versions exist, and severa...
QuartersStanding Liberty quarters (1916-1930) are one of the most beautiful US coin designs but also one of the most wear-prone....
DollarsPeace dollars (1921-1935) feature a stunning Art Deco design. While fewer varieties exist compared to Morgan dollars, se...
PenniesIndian Head pennies (1859-1909) are among the oldest commonly collected US coins. Despite their age, many error varietie...
NickelsThe 2005 Westward Journey series reused the buffalo design for one year. Due to high demand and production volume, sever...
Error Type GuidesA broadstrike occurs when a coin is struck without the retaining collar that normally holds the coin blank in place and ...
Error Type GuidesA wrong planchet error occurs when a coin is struck on a blank intended for a different denomination or even a foreign c...
Error Type GuidesA die clash occurs when the obverse and reverse dies strike each other without a planchet between them. This transfers f...
Error Type GuidesA struck-through error occurs when foreign material gets caught between the die and the planchet during striking. The re...
PenniesThe 1972 doubled die penny is one of the most popular and widely collected Lincoln cent errors. Strong doubling is visib...
PenniesThe 1969-S doubled die penny is one of the rarest and most valuable Lincoln cent errors, with specimens selling for $25,...
PenniesThe 2009 Lincoln Bicentennial pennies feature four unique reverse designs celebrating Abraham Lincoln's 200th birthday: ...
NickelsWar nickels (1942-1945) were struck in a special alloy of 56% copper, 35% silver, and 9% manganese to conserve nickel fo...
NickelsThe Westward Journey nickel series (2004-2005) featured four special designs commemorating the Lewis and Clark expeditio...
DimesThe 1996-W Roosevelt dime is the only US dime ever struck at the West Point Mint for circulation-type coinage. Approxima...
DimesThe 1982 No P Roosevelt dime is one of the most famous mint mark errors in US coinage history. When the Philadelphia Min...
QuartersThe 2000 Sacagawea dollar / Washington quarter mule is one of the rarest and most valuable modern US coin errors. These ...
QuartersSilver Washington quarters (1932-1964) are among the most widely collected US coins. Struck in 90% silver, these quarter...
QuartersThe 2019-W quarters mark the first time the West Point Mint struck quarters intended for general circulation. Approximat...
Half DollarsFranklin half dollars were minted from 1948 to 1963 and are struck in 90% silver. Designed by John R. Sinnock, these coi...
DollarsThe 2000 Sacagawea dollar launched with a massive promotion where 5,500 specially marked Sacagawea dollars were inserted...
DollarsThe Presidential dollar series (2007-2016) features 39 different presidents and is notorious for its wide range of minti...
DollarsThe 1921 Morgan dollar is the last year of this iconic series and was struck in enormous quantities at Philadelphia, Den...
Error Type GuidesLamination errors occur when impurities, gas pockets, or improperly mixed alloys in the planchet cause layers of metal t...
Error Type GuidesRepunched mint marks (RPMs) occur when the mint mark was manually punched into the working die more than once, resulting...
Error Type GuidesA mule error occurs when a coin is struck using two dies that were never intended to be paired together. This can involv...
Error Type GuidesDouble struck errors occur when a coin receives two or more impressions from the dies, typically because the coin failed...