Watch List notes:

Constans II, with Constantine IV, 641-668. Follis (Bronze, 21 mm, 4.50 g, 7 h), Constantinople, E = 5th officina, year 16 = 656-657. Constans II and Constantine IV standing facing, both crowned and wearing chlamys, each holding globus cruciger on their right hand; above and between their heads, cross. Rev. A/N/N/O - X/ЧI Large M with a plain cross above; below, E; CON in the exergue. DOC 79d var (K instead of a cross on the reverse). SB 1010. A particularly attractive coin with pleasant earthen highlights. Good very fine.