Answer
Mar 11, 2025 - 09:07 AM
The rare mistake on a 1956 D wheat penny is known as a "D over D" mint mark error, where a secondary "D" mint mark was stamped slightly off from the original, creating a doubled appearance. This error occurred during the minting process at the Denver Mint and is highly sought after by collectors due to its rarity. Such errors can significantly increase the penny's value.
