Maximianus AE Antoninianus. Siscia mint, 291 AD. 

Obv: IMP C M A VAL MAXIMIANVS P AVG, radiate head right 
Rev: VICTORIA AVGG, Maximian, facing left, holding 
sceptre, receiving Victory on globe from Diocletian, 
facing right; B in lower centre; 
Mintmark: XXI. 

RIC V-2, Siscia 586, rated rare.

Contributed by James Rush, August 2011