Watch List notes:

Constans II, with Constantine IV, 641-668. Half Follis (Bronze, 28 mm, 6.87 g, 7 h), Cherson, indiction year B = 2 = 658-659. 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. K/B Constans II standing facing, holding globus cruciger. DOC 210 (as Bosporus?). MIB 227. SB 1145C. Very rare. Sharp and nicely patinated; a clear example with excellent details for type. Very fine.

From a collection in USA.