Tarraco in Hispania, 69 AD., Vitellius, As, RIC 46.

Vitellius, Tarraco mint, 69 AD.,
As (27-29 mm / 10,59 g), copper, axes about coin alignment ↑↓ (ca. 180°),
Obv.: A VITELLIVS - IMP GERMAN , (`Aulus Vitellius Imperator Germanicus´) , his laureate head facing left, small globe at point of neck - Tête laurée de Vitellius à gauche avec un petit globe à la pointe du cou.
Rev.: VICTORIA - AVGVSTI / S - C , Victory advancing left, holding in her r. hand small round shield inscribed S P / Q R in two lines - Victoria (la Victoire) s’avançant à gauche, les ailes déployées, tenant un bouclier de la main droite inscrit S P / Q R.
RIC I, 270, 46 (common) ; BMC 107 ; CBN 74, 24 ; Coh. 103 .

This reverse type, Victory holding a small, round shield, records the awarding of the clupeus virtutis, the shield of valor, to the emperor for victories.

Originally coins with the clupeus virtutis were struck in celebration of the Senate's award of the 'clupeus virtutis' of Augustus for the legions' success in Persia and Armenia.
Augustus was given an honorary shield called the clupeus virtutis, the shield of virtue, in 27 BC., a few years after Actium.
On the clupeus virtutis was inscribed the following (original lost, text taken from one of several copies):

SENATUS POPULUSQUE ROMANUS IMP CAESARI DIVI AUGUSTO COS VIII DEDIT CLUPEUM VIRTUTIS CLEMENTIAE IUSTITIAE PIETATIS ERGA DEOS PATRIAMQUE
"The senate and the Roman People dedicated to the emperor Augustus, son of the divine Caesar the shield for virtue, clemency, justice, and piety towards the gods and his native land".