Watch List notes:

Justinian I. 527-565. AE pentanummium (12.2 mm, .91 g, 11 h). Uncertain mint. [D N IVSTI]- NIANVS (or similar, garbled), diademed, draped and cuirassed bust of Justinian I right / large V, star above; all within wreath. SBCV 338; DOC 370. VF, scant legend, thick patina.

Ex Leo Hamburger 1890's.

This coin comes from a large group of Roman Provincial, Byzantine and Vandalic coins which were part of Leopold Hamburger's inventory. More information on Mr. Hamburger can be found here:https://www.coinbooks.org/v20/esylum_v20n42a19.html