Constans II AV Solidus. 10mm, 4.48 g. Dated year 7 AD 647-648. Carthage mint. 

DN CONSTANTIN P, crowned and draped bust facing, 
beardless, holding cross on globe.
VICTORIA AVGU and officina letter gamma, cross potent on 
three steps; Theta in right field.

Mintmark CONOB. 
DOC 111; MIB 59; SB 1033. 

With permission of cngcoins.com, Jan 2016
Estimate: $300.