BYZANTINE EMPIRE; Constans II. AD. 641-668. Silver Hexagram (6.60 gm; 22mm x 25mm). Constantinople mint. Struck 654-659. Crowned facing busts of Constans II and Constantine IV; cross in field above / Cross on globe on three steps; B to right. DOC 55; SB 996. Well struck on a nice broad flan. Some minor strike weakness on reverse legends at 12. Choice EF. Lightly toned.