Byzantine
Justinian I (527-565 AD). Constantinople. Dated RY 13 (539/40).
AE Follis (40.2mm 22.12g)
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/III across field, cross above, B below; CON.
Sear 163.