The 1960-D Jefferson Nickel is the most difficult coin to find with the Full Steps designation from 1938 to 1964. As of 2014, PCGS has not graded any 1960-D Full Step Jefferson Nickels.
Most 1960-D Jefferson Nickel planchets tend to have lots of nicks and scratches usually keeping them from obtaining a high uncirculated grade. The reverse for this issue is also usually weakly struck. It is a very difficult coin to find in grades of MS66 and higher, with possibly less than 50 to 75 coins in existence that would grade MS66 or higher.