The 1913 Liberty Head Nickel was minted secretly, with only five known coins existing, making it a prized collectible worth millions today.
The 1943 Copper Penny was an accidental minting during WWII, as most pennies were made from steel to save copper for the war effort.
The 1933 Saint-Gaudens Double Eagle was never officially released, yet a few escaped, becoming one of the most valuable U.S. coins in auctions.
The 1974 Aluminum Penny was an experimental coin made for Congress, but all were supposed to be destroyed; one still remains elusive.
The 1894-S Barber Dime had a limited mintage of just 24 coins, made for special distribution, and only a few are known to survive today.
The 1804 Silver Dollar wasn’t struck in its year but later minted as a collectible, making it one of the most famous coins in U.S. history.
The 1918/7-D Buffalo Nickel features an overdated minting error, with the “7” visible under the “8,” turning it into a rare and sought-after piece.