Byzantine Empire. Justinian I (527-565). AE 40 Nummis, Nicomedia mint, 550-551 AD. Obv. Bust of Justinian frontal, helmeted; holding cross-globe; over left shoulder cross. Rev. Mark of value (M). MIB 113a. AE. g. 17.74 mm. 32.00 Dark patina. About EF.