Watch List notes:

Constans II, with Constantine IV, 641-668. Solidus (Gold, 21 mm, 4.48 g, 7 h), Constantinople, 4th officina = Δ, 654-659. d N CONStANtINUS C CONStANS Crowned busts of Constans and Constantine IV facing, each wearing chlamys; above, cross. Rev. VICTORIA AVGЧ D / CONOB Cross potent set on base and three steps. DOC 25d. MIB 26. SB 959. Sharply struck, lustrous and very attractive. Good extremely fine.