Justinian I, 527-565. Pentanummium (bronze, 2.88 g, 18 mm), Constantinople (?). [D N IVS]TINIANVS P P AVG Diademed, draped and cuirassed bust of Justinian I to right. Rev. Large Є, X/ЧI/Δ. DOC -; MIBE -; SB -. Apparently unpublished, possibly Constantinople pentanummium type (SB 170) with regnal year added above Δ or some kind of hybrid with Dekanummium SB 167/DOC 79 (RY 16). Very fine.