AE Half Follis, 25 mm max and 17.5 x 16.8 mm, 2.97 g. Constantinople mint RY 2= CE 686-687
SB 1262
O: facing bust of Justinian II
R: Large K with A/N/N/O on outer l. II on outer rt.
Ex: W. Esty
AE Decanumium, 4.07 g, 14 mm, Ravenna mint, RY 29= CE 555-556
SB 326
O: little no extant inscription due to wear. Facing portrait of Justinian.
R: large I with A/N/N/O on outer left and XX/VIIII on outer right.
Basilica San Vitale, Ravenna, Justinian mosaic c. CE 547 (fair use photo)