Probus Antoninianus, Siscia. AD 279-280.

IMP PROBVS PF AVG, radiate, draped and cuirassed bust right.
CONCORDIA MILIT, Probus standing right, clasping hand of Concordia, standing left.

Mintmark XXIVI. 

RIC V-II, 666; Cohen 162.

With permission of Numismatik Lanz, Auction 114, lot 726, May 2003.