Special Mint Set (SMS) errors are extremely rare when they are discovered in the original U.S. Government packaging.

This 1965 Washington Quarter was struck on a Nickel planchet. It is still in the original SMS Mint Set. NGC verified that this SMS set is in a U.S. Government sealed package and as not been tampered with.

NGC graded it MS 66 since it is virtually "as struck" and has been well preserved in the original package. Off-Metals in original U.S. Government SMS packaging are very rare.