Constantine II AE Follis. 

Obv: CONSTANTI-NVS IVN N C, laureate, cuirassed bust right 
Rev: GLOR-IA EXERC-ITVS, two soldiers holding spears and 
shields with two standards between them, laurel wreath at 
top centre, dot in centre. 
Mintmark: PCONST. 

RIC VII Arles 371, rated R1. 

With permission of Slavey and Tatiana, slaveycoins.com,
Sept. 2011