Constantius II, AE38 mm medallion, 22.05g. 354-361 AD. Rome. 

D N CONSTANTIVS P F AVG, pearl diademed, draped, cuirassed bust right.
VIRTVS AVG, emperor, bare-headed and in military dress,
standing right, holding vertical spear and Victory on globe;
seated captive at feet right. 

RIC VIII Rome 446; Cohen 295; Gnecchi 43. 

Very rare (R3).

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.