Error coins make us think carefully about how the minting process works and the quirks that can happen when things do not go as planned. What makes these coins special is the mistakes made at the US Mint. While coins are intended to be mass-produced, an error is a one-off item that really stands out. The Monthly Error Coin Auction at Heritage Auctions will feature a wonderful assortment of nearly 300 coins, ranging from the 1700s to present day. Check out this great assortment of pieces, and see