Constantine II AE3. 

Obv: CONSTANTINVS IVN NOB C, laureate, cuirassed bust right. 
Rev: GLOR-IA EXERC-ITVS, two soldiers holding spears and shields with two 
 standards  between them. 
Mintmark: R(wreath)S. 

RIC VII Rome 351, rated scarce

Contributed by Dane, October, 2005.