Constantine I. AE Follis.
Obv: IMP CONSTANTINVS PF AVG - Laureate head right (B1). 
Rev: IOVI CON-SERVATORI - Jupiter standing left, holding Victory on a globe and sceptre, an
eagle with wreath in its beak.
Exergue: (dot)SIS(dot). Siscia Mint. (gamma) in right field.
Ref: RIC VII Siscia 15. R2. 315-316 A.D.
 
Contributed by Gary Unwin, May, 2004.