BYZANTINE EMPIRE. Constans II, with Constantine IV. 641-668. Æ follis. 4.48 gm. 27 mm. Syracuse mint. Struck 654-659. Constans and Constantine standing facing / Large M; monogram above, SCL below. SB 1109. Very Fine; attractive glossy green patina with earthen highlights; overstruck, as usual for issue; extremely sharp strike on a giant flan. Neat coin.