Justinian I (527-565) Æ Follis (Bronze, 22.52g, 42mm) Constantinople, Dated RY 12 (538/9).
Obv: DN IVSTINIANVS P P AVG, Diademed, helmeted, and cuirassed bust facing, holding globus cruciger and shield; cross to right
Rev: Large M; cross above, A/N/N/O XII across fields; Γ//CON.
Ref: DOC 37c; MIBE 95a; SB 163.