Constans, AE medallion, 36 mm, 24.85 g. AD 340-347. 

DN FL CONSTANS AVG, laurel and rosette-diademed, draped, cuirassed bust right. 
VIRTVS AVG N, emperor on horseback, holding spear, galloping right, leaping over a fallen enemy beneath the horse. 

Kenner 294; Cohen 104.

Image from the Kenner catalog.