Watch List notes:

Constantius II. A.D. 337-361. Æ centenionalis (21.6 mm, 4.73 g, 6 h). Siscia mint, Struck A.D. 350. Struck under Vetranio. D N CONSTANTIVS P F AVG, pearl-diademed, draped and cuirassed bust right, A behind head, star below chin / HOC SIGNO VICTOR ERIS, emperor standing left, holding labarum and spear; Victory crowns him with wreath; A to left, ·ЄSIS·. RIC 286; LRBC 1173. gVF, black patina. 

The reverse legend repeats the motto of Constantine's vision in A.D. 310, "By this sign you will conquer."