Watch List notes:

BYZANTINE EMPIRE: Heraclius, 610-641, AV solidus (4.47g), Constantinople, S-741A, busts of Heraclius left and his son Heraclius Constantine right, both with short beard & simple crown // cross potent on 3 steps, letter N to right, officina E, bold strike, choice EF.

This type, with the letter N, occurs only with officina E.

Estimate: 350-450 USD