Watch List notes:

Heraclius and Heraclius Constantine. 613-641. AE half follis (17.6 mm, 3.37 g, 7 h). Rome mint. D N ЄRACCLIORVN (or similar, sic.), facing busts of Heraclius on left and Heraclius Constantine on right, each beardless and wearing crown and chlamys; cross between their heads / Large XX; above, cross // ROM. SBCV 889; DOC 261. VF, large rim chip at 4:00.

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