Watch List notes:

Heraclius, Heraclius Constantine and Martina. 613-641. AE half follis (16.5 mm, 3.46 g, 6 h). Rome mint, Struck 623/4. legend illegible, facing busts of Heraclius in center, Heraclius Constantine on right and Martina on left, each wearing crown and chlamys / Large K, to left, [A / N / N] above [X], to right IIII (= yr 14 = 623/4 ) // ROM. SRCV 891. Rough VF / F, some encrustation, particularly on reverse.

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