Justin I and Justinian I. Antioch, AE Follis. 31mm, 14.89 g. 

DN DN IVSTINVS ET IVSTINIANVS, nimbate and pearl diademed, draped and cuirassed busts of Justin I and Justinian I, facing, cross between their heads.
Large M, star to left, cross above, star to right

Officina letter Delta below.
mintmark ANTIX. 

Sear Byz 130, DOC 14; Sabatier 3; MIBE 10.

With permission of cngcoins.com, auction 403, Lot 637, Aug 2017.