Justinian I (527-565) AE Follis (Bronze, 35mm, 19.91g) Nicomedia.
Obv: D N IVSTINIANVS P P AVG, Helmeted and cuirassed bust facing, holding globus cruciger and decorated shield; cross right in field.
Rev: Large M; cross above, B below. A/N/N/O-XXII across field; in exergue, NIKO.
Ref: Sear 201