Probus AD 276-282 AE Antoninianus 

Obv: IMP PROBVS AVG, radiate, draped and cuirassed bust right.
Rev: ADVENTVS AVG, Probus on horseback left, holding 
sceptre, right hand raised, captive before. 

Mintmark R star B

RIC V-2, 157; Cohen 37. 

With permission of cgb.fr, August 2005.