Constantine. AE3. Struck 330-335 AD. 

Obv: CONSTANTI-NVS MAX AVG, laureate, draped & cuirassed 
bust right
Rev: GLOR-IA EXERC-ITVS, two soldiers holding spears & 
shields with two standards between them, standards with 
thin pointed banners, TR dot P in ex. 

RIC VII Trier 538, rated R4.

Contributed by Dane for Pete Clegg (biffabacon10)