$20 1988-A FRN INK SMEAR over-inking ERROR Unusual Target Shape by White House Ch VF+

Although a seemingly minor mistake, this overinking/ ink smear error is actually quite impressive and unusual! Not only is there a circular smear featuring dark green ink from the back, there is a thick blob of layered ink inside which creates a "target" near The White House design on the back.  Tougher denomination with the small-head design, but the real impressive nature of this note is the shape and series of smears.