Constantine I. AE Follis. Lyons. 321 AD. 2.95g; 20mm

Obv: CONSTAN-TINVS AVG, laureate head right
Rev: VIRTVS-EXERCIT, two bound captives seated at base of 
standard inscribed VOT XX. 

C-R across fields. 
Mintmark PLG. 

RIC VII Lyons 113. Rare (R1).

With permission of Roma Numismatics, January, 2010