Byzantine Empire. Justinian I (527-565). AE 20 Nummi, Constantinopel mint, 538-539 AD. Obv. Bust of Justinian frontal, helmeted; holding cross-globe; over left shoulder cross. Rev. Mark od value (K). MIB 96. AE. g. 10.35 mm. 31.00 Green patina. About EF.