Bronze centenionalis, 22mm, 5.06gm, issued AD 348/349 Rome mint.
Obv: DN CONSTANS PF AVG, Diademed, draped bust facing right.
Rev: FEL TEMP REPARATIO (RP in ex.), Emperor standing in galley left holding Phoenix and labarum, galley steered by Victory in rear, B in left field.
References: Sear 18654, RIC 118.