Constantine the Great AE3 Follis. Early 312 AD. 

Obv: IMP CONSTANTINVS P F AVG, laureate head right 
Rev: IOVI CONSERVATORI, Jupiter standing left with thunderbolt & scepter,  
  eagle at foot to left, <mu>/H to right, SIS in ex.

Rated Scarce.

Contributed by Martin Griffiths, June, 2003.