The 1943 Bronze Lincoln Cent remains one of the most fascinating error coins in American history, a product of chance during the chaos of World War II. In 1943, the U.S. Mint switched from bronze to zinc-coated steel cents to save copper for the war effort.

Amid the transition, a few leftover bronze planchets from 1942 were mistakenly left in the minting machinery. These planchets were struck with 1943 dies, creating a handful of bronze cents that should never have existed.

When the first examples appeared in circulation in 1947, they immediately caught the public’s attention. People were astonished that such an oversight had occurred during a period of tight wartime control and precision.