Constantius II, Cyzicus.

DN CONSTAN-TIVS PF AVG, pearl diademed, draped, cuirassed bust right
FEL TEMP-REPARATIO, Soldier standing left, knee raised, spearing fallen horseman wearing Phrygian helmet, no beard, reaching backwards, no field marks, SMK[officina letter] in ex. 

RIC VIII Cyzikus 104/110 (104 and 110 are identical, simply apparently struck at different times).

Dane's Collection. June 2009.