Watch List notes:

Constans II, with Constantine IV, 641-668. Solidus (Gold, 20 mm, 4.50 g, 7 h), Constantinopolis, 654-659. δ N CONSTANTINЧS C CONSTANTI Crowned and draped bust of Constans facing, with long beard and whiskers, on the left; crowned, draped and beardless bust of Constantine IV facing, above, cross. Rev. VICTORIA AVGЧ A / CONOBI Cross potent on base and three steps. DOC 26a. MIB 28. SB 960. Minor flan fault on the reverse, otherwise, extremely fine.