Billon centenionalis, 23mm, 5.40gm, issued AD 348-350 Rome mint.
Obv: DN CONSTANS PF AVG, Diademed, draped, cuirassed bust right.
Rev: FEL TEMP REPARATIO (RE in ex.), Emperor standing left on galley, holding phoenix on globe and standard with Chi-Rho on banner, ro right seated Victory, Δ before.