Byzantine Empire (Constantinople mint, 3rd officina), AV solidus, Constans II and Constantine IV (641-668 AD), struck 654-659. MIB 26; Sear 959. 4.32 grams. Crowned facing busts of Constans and Constantine, each wearing chlamys; cross above / Cross potent set on three steps. Lustrous AU-, nice full details, the reverse slightly off-center.
Estimate: $400 - 600