Constantine I, AE follis, Constantinople.

CONSTANTI-NVS MAX AVG, ladder shaped diademed head right
GLORIA-EXERCITVS, Soldier standing left, looking right, reversed 
spear in right hand, left hand on shield set on ground.

Fieldmark: S (digamma) in left field
Mintmark: CONS

Ref: RIC VII, Constantinople, 22
Rated R3

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