Watch List notes:

C. Vibius C.f. Pansa. 90 B.C. AE as (29.2 mm, 13.20 g, 3 h). Semuncial standard. Rome mint. Laureate head of Janus, I above / ROMA / C·VIBIV·C·F / PANSA, three prows of galleys right. Crawford 342/7b; Sydenham 690. aVF, two casting sprues. 

Ex RBW collection (not in previous sales), Ex CNA IX, lot274.