What to Look For: A 1943 penny that looks copper instead of the standard steel-gray color.
Why It’s Valuable: In 1943, the U.S. Mint switched to zinc-coated steel to save copper for WWII. However, a few bronze planchets accidentally slipped through. Value: Depending on condition, $100,000 to over $1,000,000.
What to Look For: Doubling in the date (“1955”) and the words “LIBERTY” and “IN GOD WE TRUST.”
Why It’s Valuable: A minting error caused the image to appear doubled. Value: Even circulated versions can fetch over $1,000. Mint-condition pieces can go for much more.
Why It’s Valuable: Like the 1955, this was due to a misalignment during striking. Value: Prices range from $300 to over $1,000 depending on grade.
Why It’s Valuable: A rare misprint caused the normally spaced “A” and “M” to appear almost touching. Value: $1,000 and up, even for circulated coins.
Why It’s Valuable: Another classic doubling error that collectors love. Value: Prices vary, but high-grade examples fetch hundreds.