Constantine II, AE follis, Trier. 320 AD.

CONSTANTI-NVS IVN NC, radiate, draped, cuirassed bust left.
VIRTVS-EXERCIT, Trophy standing on ground, captive seated 
on either side. 
Star in left field.
Mintmark STR. 

RIC VII Trier 253 var (unlisted officina S)
Very rare.

With permission of CGB auction, April 2008.