Major mint errors in the 2¢ series are very rare. This super deep obverse die cap mated set came from a major mint error collection that was assembled over 30 years ago. The obverse die cap is so deep it did not fit in a PCGS slab but was authenticated and has the official PCGS insert and photo proof.
It is amazing that this unique 2 piece die cap pair survived almost 150 years. Both coins are in original mint state condition. This is only one of three known die cap pairs on any U.S. denomination prior to 1940. It is a spectacular mated pair and it is exciting to see it again after 3 decades.