Watch List notes:

Constans II. 641-668. AE dodecanummium (20.6 mm, 7.05 g, 7 h). Alexandria mint. no legend, Constans, beardless 3/4 length standing facing figure, wearing crown and chlamys and holding long cross topped with Chi-Rho Christogram, and globus cruciger / large I B divided by cross potent on globe, pellets in field to left and right // AΛЄΞ. SBCV 1027 ; DOC 105. Near VF for type, somewhat thick patina, well-centered.

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