Constantine I, AE follis. Siscia. 18mm, 2.90 g. AD 321-324.

CONSTANTINVS AVG, laureate head right.
DN CONSTANTINI MAX AVG around VOT XX within wreath. 

Mintmark Epsilon SIS wreath.

RIC VII Siscia 177; Sear 16220. 

Exceptionally rare, R5.

Contributed by Carpediem Numismatics, April 2017.