Severus Alexander Den "Providentia"2.9gm. Severus Alexander AD 222-235
  Silver Denarius "The future is known to the emperor" Obv: IMP ALEXANDER
PIVS AVG - Laureate head right Rev: PROVIDENTIA AVG - Providentia
  standing left, holding corn ears, an anchor, and at her front, a modius.
Rome mint AD 231-235 = RIC 252a - Cohen 508