Probus, AE antoninianus, Serdica, 277 AD. 

IMP C M AVR PROBVS AVG, radiate, helmeted and cuirassed bust 
left holding spear and shield decorated with aemperor
on horseback spearing fallen enemy.
VIRTVS PROBI AVG, Emperor on horseback left, holding
sceptre and raising right hand, captive on ground to right.

Mintmark KA delte

RIC V-2 Serdica 887

Contributed by T&S Petrov, August 2012.