1859 Obverse Mule
   The major error coin of the Indian Head denomination was verified only recently. Rumored to have existed for decades, the 1859 Obverse Mule -- both sides of the coin struck with obverse dies -- surfaced in 2000. Its appearance utterly amazed even the most experienced error experts. It sold to Legend Numismatics for $33,350 in the 2000 Superior Pre-Long Beach Sale.
1859 Obverse Mule/PCGS MS62