Constantine I AE Light Follis. (4.23 grams; 23.43 mm.) Trier. 310-313 AD. 

Obv: IMP CONSTANTINVS AVG, laureate, draped & cuirassed bust right 
Rev: MARTI CONSERVATORI, helmeted & cuirassed bust of Mars right, no mintmark. 

RIC VI Trier, 882, rated scarce.

Contributed by Dane for TimeLine Originals, December, 2008.