Constantine I, AE3. 

Obv: CONSTAN-TINVS MAX AVG, helmeted bust right 
Rev: VICTORIAE LAETAE PRINC PERP, two Victories standing facing one another,  
 together holding shield inscribed VOT/PR on altar. 
cross on altar, type "Helvetica 6c".
Mintmark ST. 

RIC VII Ticinum 86, rated R3. 

With permission of www.slaveycoins.com, March 2012.