Constantine AE follis. Struck 327-328 AD. Alexandria. 19 mm, 2.79 g.

CONSTANTINVS AVG, laureate head right.
PROVIDENTIAE AVGG, campgate with two turrets and star above. 

Wreath in left field. 
Nothing in right field. 

Mintmark SMALA. 

RIC VII Alexandria 41.

Image courtesy of the ANS, 1944.100.11595.