Obverse: Bust of the emperor wearing a radial crown, armor and paludamentum, facing right, surrounded by the legend Q HER ETR MES DECIVS NOB C.
Reverse: Herennius in military dress, standing left, holding wand and inverted long scepter, surrounded by legend PRINCIPI IVVENTVTIS
Silver, diameter 20.5-22.5 mm, weight 3.82 g.