Justinian I (527-565) AE Follis (Bronze, 20.51g, 35mm) Cyzicus, Dated RY 21 (547/8).
Obv: D N IVSTINIANVS P P AVG, Helmeted and cuirassed bust facing, holding globus cruciger and shield decorated with horseman motif; cross to right.
Rev: Large M; A/N/N/O - X/X/I across field; cross above, B below; KYZ.
Ref: Sear 207.