Bronze, 2.70 grams, 18.56 mm. Siscia. 320-321 AD. Obverse: CONSTAN-TINVS AVG, laureate head right. Reverse: DN CONSTANTINI MAX AVG, around VOT XX within wreath; mintmark delta SIS sunburst in exergue. RIC VII Siscia 180; cf Sear 3873. Slightly dirty, otherwise Fleur De Coin. A significant coin which has been published on wildwinds.com