Probus AE Antoninianus. Siscia mint. 22 mm, 4.02 g.
 
IMP C M AVR PROBVS P F AVG, radiate bust left, wearing imperial mantle, holding eagle-tipped sceptre.
VIRTVS PROBI AVG, Mars waling right, holding trophy and spear.

Q in right field. Mintmark XXI.

With permission of Solidus Numismatik - Monthly Auction 23, Lot 671, Jan 2018.