Constantine I AE3. 

Obv: CONSTANTI-NVS MAX AVG, rosette-diademed, draped, cuirassed bust right. 
Rev: GLOR-IA EXERC-ITVS, two soldiers holding spears and shields with two standards between them. 
Mintmark: SMHB<font face="SYMBOL">&#42;</font> 
   <font face="SYMBOL">&#183;</font>in centre. 

RIC VII Heraclea 136, rated R3

Contributed by Dane, October, 2005.