Constantine II. 330-335 AD. Cyzicus. 

CONSTANTINVS IVN NOB C, laureate, cuirassed bust right
GLOR-IA EXERC-ITVS, Two soldiers facing, heads turned 
towards each other; each holding a spear and resting hand 
on shield, two standards between them, o on banners.

Mintmark: dot SMK Epsilon
RIC VII Cyzicus 97; Sear 17341.