1894-S Barber Dime
Here’s another mystery of American numismatics. With an original mintage of just 24 pieces — all struck as proofs — the 1894-S Barber Dime is one of the most valuable pieces of American coinage. What’s strange is that the San Francisco Mint (designated by the “S” in the coin’s name) didn’t typically produce proof coins, a job that was handled by the main mint in Philadelphia. And while we may never know the full story of how or why these dimes were minted, what we do know is that the finest examples of these mysterious ten-cent pieces can sell for upwards of $1,000,000.