Uncovering Upside‑Down U.S. Coins: Rotated Die Errors Worth $2,500+ July 15, 2025July 15, 2025Debbi Discovering an upside‑down U.S. coin, also called a rotated die error, can be thrilling—and possibly lucrative. These minting mistakes occur when a die shifts during striking, causing the reverse (tails) to be rotated relative to Continue reading