AR Hexagram of Heraclius & Heraclius Constantine

AR Hexagram of Heraclius & Heraclius Constantine AD 610 to 641 Heraclius with short beard on left & Heraclius Constantine, beardless on right, seated on double throne; holding globus cruciger. Between their heads a cross. dd.NN. hERACIuS ET hERA CONST Rev:- Cross potent on globe above three steps. Letter K in field to right. DEUS ADIUTA ROMANIS. Sear (BCV) No 798. Dumbarton Oaks Catalogue 64. Bought TV Coins December 1974