Constantine I AE3. 330-335 AD. Trier. 

CONSTANTI-NVS MAX AVG, rosette-diademed, draped, cuirassed
 bust right
GLOR-IA EXERC-ITVS, two soldiers holding spears and shields
 with two standards between them. Standards have no drapery
 and very thin shafts with pointed tops instead of banners.

Mintmark: TR dot P

RIC VII Trier 537

With permission of Roma Numismatics, August, 2009