Licinius I AE Follis. 311 AD. 

obv: IMP LICINIVS P F AVG, laureate head right 
rev: IOVI CONSERVATORI, Jupiter standing left with thunderbolt and sceptre, 
   eagle at foot with wreath in its beak, A over Greek letter mu in right field,
   .SIS. in ex. 

(RIC doesn't mention any dots in the mintmark; not sure if that would constitute a new type.)
Contributed by Dane, May, 2003.