$5 1988-A FRN INSUFFICIENT INKING ERROR - FINEST KNOWN PCGS Superb Gem 69PPQ

Wow! A marvelous mistake preserved in impressive condition sitting one point shy of perfect. The ink wells began to run dry as this note received its first (back) printing leaving a very faint impression on the left side of the design. Acquiring any note in Superb Gem 69PPQ is impressive, but to have an error of this magnitude preserved so perfectly, simply defies logic.