Justinian I (527-565) AE Follis (Bronze, 40mm, 23.05g) Constantinople mint, 2nd officina. Dated RY 15 (AD 541/2).
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/U across fields; B//CON.
Ref: DOC I 40b; MIBE 95a; Sear 163.