Watch List notes:

The Collection of Roman Republican Coins of a Student and his Mentor Part III

C. Vibius C. f. Pansa. Denarius 90, AR 3.68 g. PANSA Mask of Pan r. Rev. C·VIBIVS·C·F Mask of bearded Silenus r. Babelon Vibia 9. Sydenham 688. Crawford 342/2.
Very rare. Control-mark on reverse, otherwise about very fine
Ex Sternberg sale XXII, 1989, 193.