Watch List notes:

Egypt, Alexandria. Diocletian. A.D. 284-305. BI tetradrachm (19.5 mm, 6.57 g, 1 h). Alexandria mint, Struck A.D. 285/6. A K Γ OVA Λ ΔIOKΛHTIANOC CЄB, laureate and cuirassed bust of Diocletian right. / Alexandria wearing mural headdress standing facing, head left, holding bust of Sarapis and scepter; in fidlds, L -- B ( = yr. 2 = A.D. 285/6 ). Emmett 4025. Good VF, green patina in fields.

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