Posthumous issue of the Aureus Usurper? I think you're meaning Postumus issued by the rebel Aureolus (I desperate plea for help from the Gallic emperor that went unanswered). Aureolus never issued any Aureii or Sestertii - if its a sestertius or double sestertius, it would have to have been issued by Postumus. It could also be an antoninianus blown up, but without pictures I wouldnt be able to say.





















