Crawford 235/1c, Roman Republic, 137 BC., Rome mint, moneyer Sextus Pompeius Fostlus, Denarius.

Roman Republic, Rome mint, moneyer Sextus Pompeius Fostlus, 137 BC.,
Denarius (ø 17-19 mm / 3,66 g), silver, axes medal alignment ↑↑ (ca. 0°), toning,
Obv.: X , helmeted head of Roma r.; value mark below chin, X, in l. field, jug, bankers marks C on jug and cheek.
Rev.: SEX.P[O F – OST LVS] / ROMA , Lupa Romana (Roman she-wolf) suckling twins Romulus and Remus; behind, ficus Ruminalis with one bird on trunk [and two? on upper branches]; in l. field, the shepherd Faustulus leaning on staff. In exergue, ROMA.
Crawford I, 267, 235/1c (citing 127 obv. dies and 159 rev. dies - of all three var.) ; Babelon Pompeia 1 ; Sydenham 461a .
ex Künker
the moneyer is probably Sextus Pompeius, Pr. 119, father of Cn. Pompeius Strabo.

In Roman mythology, Faustulus was the shepherd who found the infant twins Romulus and Remus, who were being suckled by a she-wolf, known as Lupa, on the Palatine Hill. He, with his wife, Acca Larentia, raised the children. In some versions of the myth, Larentia was a prostitute (known in Latin as lupae, or 'she-wolves'). The name Faustulus was later claimed by a Roman family. One member of them was moneyer in Rome 137 BC: Sextus Pompeius Fostlus issued this silver denarius showing Faustulus with the twins and she-wolf on the reverse.

Romulus and Remus are the twin brothers and central characters of Rome's foundation myth. Their mother is Rhea Silvia, daughter to Numitor, king of Alba Longa. Before their conception, Numitor's brother Amulius seizes power, kills Numitor's male heirs and forces Rhea Silvia to become a Vestal Virgin, sworn to chastity. Rhea Silvia conceives the twins by the god Mars, or by the demi-god Hercules; once the twins are born, Amulius has them abandoned to die in the river Tiber. They are saved by a series of miraculous interventions: the river carries them to safety, a she-wolf (in Latin, lupa) finds and suckles them, and a woodpecker feeds them. A shepherd and his wife find them and foster them to manhood, as simple shepherds. The twins, still ignorant of their true origins, prove to be natural leaders. Each acquires many followers. When they discover the truth of their birth, they kill Amulius and restore Numitor to his throne. Rather than wait to inherit Alba Longa, they choose to found a new city.