Constantine II AE follis of Cyzicus. AD 337-348. 

DN CONSTANTINVS PF AVG, laureate head right.
GLOR dot IA EXERC ITVS, Two soldiers standing facing each 
other, each holding a spear and resting hand on shield, one 
standard between them. 

Mintmark SMK delta. 

RIC VIII Cyzicus 6; Sear 17439.
Scarce.