Diocletian, AE Follis. Lyons. 298 AD. 

IMP C DIOCLETIANVS P AVG, laureate head right
GENIO POPV-LI ROMANI, Genius standing left, modius on head, 
naked except for chlamys over left shoulder, holding patera 
and cornucopiae. 

A in left field. 
Mintmark LP. 

RIC VI Lyons 27a unlisted var (obv legend with P AVG only). Very rare.

With permission of Roma Numismatics, Jun, 2010