Justinian I (527-565). AE Half Follis, Rome mint, struck 537-539 AD. Obv. Diademed, draped, and cuirassed bust right. Rev. Large K; star to left, cross to right; all within wreath. Sear 301. D.O. 325a. AE. g. 7.33 mm. 20.70 Good VF. Wonderful untouched green patina. Rare.