The term denotes the monetary worth assigned to a United States one-cent coin minted in 1943 at the Denver Mint, and composed of an unusual metallic composition for that year. Regular production of this coin utilized steel coated with zinc due to copper shortages during World War II. However, some were mistakenly struck on bronze planchets, leading to significantly enhanced collectibility.
These accidental bronze pieces are highly valued due to their rarity and historical context. The bronze composition contrasts with the standard steel wartime issue, making them readily identifiable and desirable among numismatists. Their value stems from their scarcity and the intriguing story of an error in the minting process during a pivotal period in global history.