Watch List notes:

Constantius II. AD 337-361. Æ Centenionalis (21mm, 4.76 g, 12h). Constantinople mint, uncertain officina. Struck AD 351-355. Pearl -diademed, draped, and cuirassed bust right / Soldier attacking left, holding shield and spearing fallen horseman; shield on ground to right; Γ•//[CONS?]. Cf. RIC VIII 106. Dark green and brown patina, roughness on obverse, irregular edge. Good VF.

Although the mintmark is not visible, the symbols in the reverse field suggest that this coin was struck at Constantinople.