Constantine II, AE3. 307-324 AD. Trier. 

CONSTANTI-NVS IVN N C, laureate, cuirassed bust right
Rev: GLOR-IA EXERC-ITVS, two soldiers holding spears and 
shields with one standard between them, o on banner.

Mintmark: dot TRS dot

RIC VII Trier 591, rated R2

With permission of ArtCoinsRoma, July 2012.