Watch List notes:

Egypt, Alexandria. Probus. A.D. 276-282. BI tetradrachm (19.8 mm, 5.88 g, 11 h). Alexandria mint, Struck A. D. 277/8. A K MAP ΠPOBOC CЄB, laureate, draped and cuirassed bust of Probus right / Eirene (Pax) standing facing, head left, holding olive-branch and scepter; in field left, LΓ ( = yr. 3 = A.D. 277/8 ). Emmett 3986. Rough Fine / Near VF, pitting on obverse devices, in reverse field and around rim.

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