Circulation issue coins are normally produced in relatively large numbers, and are primarily meant to be used as pocket change, not collected.
Preserved circulation coins are one of the primary sources by which scientists reconstruct the culture, history, and society of the time in which they were used.
The state strictly controls the issuance of coins at mints to prevent counterfeit money's distribution.
These coins are especially valuable to numismatists, as each one is associated with a unique story: The United States Mint's official records list no Liberty Head nickels produced that year.
However, in December 1919, a previously unknown 1913 Liberty Head nickel was shown at a meeting of the Chicago Coin Club.