Constantine I AE follis AD 309-10 Obv: CONSTANTINVS P. F. AVG. Bust laureate, draped, cuirassed, seen from rear. REV: MARTI CONSERVATORI [To Mars, the saviour] Helmeted and cuirassed bust of Mars, right In ex. PLG Lugdunum (Lyons) RIC VI 304 c Contributed by Victor Clark October 2005