Billon antoninianus, VALERIANVS CAES, radiate, draped bust right / IOVI CRESCENTI, the child Jupiter sitting right on the goat Amalthea, looking left, right hand raised, left hand holding the goat’s horn.
Abridgment From Wikipedia:
Publius Licinius Cornelius Valerianus (died 257 or 258), also known as Valerian II, was the eldest son of Roman Emperor Gallienus and Augusta Cornelia Salonina who was of Greek origin and grandson of the Emperor Valerian who was of a noble and traditional senatorial family.
Shortly after his acclamation as Emperor (Augustus) Valerian made Gallienus his co-Emperor and his grandson, Valerian, Caesar, in 256.
The young Caesar was then established in Sirmium to represent the Licinius family in the government of the troubled Illyrian provinces while Gallienus transferred his attentions to Germany to deal with barbarian incursions into Gaul. Because of his youth (he was probably no more than fifteen at the time), Valerian was put under the guardianship of Ingenuus, who seems to have held an extraordinary command as governor of the Illyrian provinces, i.e. Upper and Lower Pannonia and Upper and Lower Moesia.
It is reported that Salonina was not happy with this arrangement. Although she could not publicly dispute the decisions of Valerian, the pater patriae which had been formally agreed by her husband, Gallienus, she suspected Ingenuus’s motives and asked an officer called Valentinus, otherwise unknown, to keep an eye on him. Despite this precaution, Valerian died in late 257-early 258 in circumstances sufficiently suspicious for Gallienus to attempt to demote Ingenuus. It was this action that sparked the attempted usurpation of the Empire by Ingenuus, who had widespread support among the Illyrian garrisons and the provincial establishment.