Heraclius and Heraclius Constantine, AV solidus, Carthage mint. AD 618-619.

dN ERACLIO ET ERA CONST P P (or similar) and indictional year, crowned facing busts of Heraclius with short beard on left and Heraclius Constantine, smaller and beardless, on right, each wearing chlamys and crown, cross between their heads. 
VICTORIA AVGG (or AVGU) and indictional year, cross potent on one or two steps. Sometimes with Π or dot in left field and/or Gamma, Pi, Theta or star in right field; mintmark CONOB. 

MIB III 83; SB 867.