Justinian I (527-565) AE Follis (Bronze, 20.97g, 35mm) Constantinople Dated RY 16 (542/3).
Obv: Diademed, helmeted, and cuirassed facing bust, holding globus cruciger and shield; cross to right
Rev: Large M; cross above, A/N/N/O X/UI across fields; E/CON.
Ref: Sear 163.