Diocletian. Antoninianus. 290 AD. 

Obv: IMP DIOCLETIANVS AVG, radiate, cuirassed bust right, seen 
from the back
Rev: IOVI FVLGERATORI, Jupiter standing facing, head right, 
left leg drawn back, right hand raised about to hurl
 thunderbolt right, chlamys draped over left arm and flying 
out to right, eagle at foot to left, XXI Gamma in ex.

RIC V-2 168 var (officina). R

RIC does not describe this series as having an eagle, although all examples discovered so far do have an eagle. However, the coin is listed only for officina B.

Used with permission of TimeLine Originals (www.time-lines.co.uk), June 2009