Cr. 232/4 "CN GEL"(Cnaeus Gellius) series, Æ quadrans, 138 B.C.
Roman Republic Æ quadrans(18.3 mm, 6.16 g, 11 h). Cnaeus Gellius, moneyer, 138 B.C. Rome mint. Head of young Hercules right, wearing lion's skin headdress, three pellets behind / CN·GEL, prow of galley right, three pellets below. ROMA below. Crawford 232/4; Sydenham 435b; Russo RBW 965.
Ex RBW Collection, ex Goodman Collection(Privately purchased on 12/7/1996). Reportedly(via private correspondence) purchased from Baranowsky in 1982.
The moneyer may be the same Gellius who is known for writing an early history of Rome but it is impossible to say for certain.