Justinian I, AE Follis, 538/539, Year 12, Constantinople, Officina 4D N IVSTINI_ANVS P P AVGHelmeted, cuirassed bust facing, globus cruciger in right hand, shield in left, cross in right fieldLarge M, A/N/N/O to left, XII to right, cross above, D below CON in exergue 41mm x 43mm, 22.63g