90 BC.  Vibia 9.  C. Vibius C. F. Pansa  (Cr 342/2)
    superb style and nearly full silvering
    Pan head right, PANSA below
    /bearded Silenus head right, C VIBIVS C F below (off flan)

Crawford notes only two dies; it is very rare. I wonder if all specimens are actually plated. The style of this one is extremely close to the "official" ones pictured.
  18 mm.  10:30.  3.34 grams.

References:  Banti Vibia 22, 23