Constans II. A.D. 641-668. AV solidus (12 mm, 4.34 g). Carthage, A.D. 658/9. 

Crowned facing busts of Constans, holding globus cruciger, and Constantine IV / Cross potent on three steps; P in right field; B/CONOB. 

DOC 122; SB 1040. XF.

Courtesy of Heritage Auctions, From the Geneva Collection. June 2005

Added in Nov. 2010.