Constantine I. AE Follis. Constantinople. 330-335 AD. 

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 with o on banners. 

Mintmark CONSB. 

RIC VII Constantinople 59. Rare (R1).

With permission of Roma Numismatics, May, 2010