Very rare variant of this otherwise popular reverse type. Guillemain only cites 3 examples!
OBVERSE: IMP C PROBVS AVG
REVERSE: ADVENTVS AVG = emperor on horse riding left, right hand raised, holding sceptre, catpive at foot (adventvs scene)
BUST TYPE: B = radiate, cuirassed bust right
FIELD / EXERGUE MARKS: -/-//R(WREATH)Z
WEIGHT 3.78g / AXIS: 12h / WIDTH 20-20,5mm