Byzantine
Justinian I (527-565 AD). Constantinople (dated RY 13=539-540 AD)
AE Follis (38mm 22.94g)
Obv: DN IVSTINIANVS P P AVG helmeted and cuirassed bust facing, holding cross on globe with right hand and shield with horseman motif in left, cross to right
Rev: Large M, ANNO to left, cross above, regnal year X-III to right, officina letter E below; mintmark CON in exergue.
Sear 163; MIB 95a; Sommer 4.20.