Justin I. AE half follis. Constantinople mint. AD 518-527. 5.5 g.

DN IVSTINVS PP AVG, pearl diademed, draped and cuirassed bust right.
Large K, long cross to left, star above, officina letter to right (here: Gamma), star below.

No mintmark. 

Sear Byz 69, DOC 15.

Sold by Noble Numismatics auction 117, Lot 4952 (part), April 2018.