Probus (276-282 A.D.) -  AE Antoninianus - 22.72mm, 3.15gr
Obverse - IMP C M AVR PROBVS PF AVG
Probus, his radiate and cuirassed bust right.
Reverse - VIRTVS PROBI AVG
Emperor galloping right, spearing enemy whose shield lies beneath horse.
KA dot A dot in Exergue.

Minted at Serdica (Sofia, Bulgaria), 4th emission, 1st officina in 277 A.D.

Reference:  
Webb, P.H., "Roman Imperial Coinage", Volume 5, Part 2 (RIC), p113, nr. 877, bust type F.
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), nr. 917
Van Meter, D., "Handbook of Roman Imperial Coins", p262, nr 60, var with Ol/6.
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC2),  unlisted (B72, O38, R195, T063, M5)

Quality: Very Fine+

Ex JHE Auction 24, Lot 107
Ex American Numismatic Society
Ex Huntington collection