Byzantine
Justinian I the Great (527-565 AD) Constantinople AE Follis or nummi (35 mm, 16,6g)
Obv: D N IVSTINI-ANVS PP AVG, helmeted, cuirassed bust of Justinian I facing, globus cruciger in right hand, shield decorated with horseman motif in left; cross in right field.
Rev: Large M (mark of value); A/N/N/O to left, X/uı (date) to right, cross above, B (officina) below; CON in exergue.