Probus AE Antoninianus, Serdica.

IMP C PROBVS P AVG, radiate, cuirassed bust left, holding spear
and shield.
SOLI INVICTO, Sol, holding whip, in facing, spread quadriga.
Mintmark KAB.

RIC V-2 Serdica 863 var (obv. legend). Scarce.

Contributed by Tony Owens, April 2011.

Note: RIC lists only 
- IMP CM AVR PROBVS PF AVG (RIC 861)
- IMP C PROBVS PF AVG (RIC 863)
- IMP CM AVR PROBVS P AVG (RIC 864 with dots in mintmark)
- IMP CM AVR PROBVS PIVS AVG (RIC 865)