I was looking for a little help on this Constantine issue. From what I can gather it's a Constantine III AE3. The weight is 2.3g and width 20mm. I got DNC I NVSPFAVG from the obverse and the reverse looks to be GLORIA ROMANORVM as per http://romancoin.info/ Thanks for looking Ben
Its not Constantine III. I jsut dont have the time right now to research it, if someone hasnt attributed it by tonight I will give it a shot