Watch List notes:

Constantine X Ducas, 1059-1067. Histamenon (Gold, 27 mm, 4.33 g, 6 h), Constantinople. +IhS IXS REX REGNANThIm Christ, nimbate, seated facing on square-backed throne, raising his right hand in benediction and holding book of Gospels in his left. Rev. + KωN BACΛ O ΔOUKAC Constantine standing facing, wearing crown and loros, holding a labarum, decorated with a pellet on a shaft, in his right hand and a globus cruciger in his left. DOC 1b. SB 1847. Nicely centered and clear. Good very fine.

From the inventory of a Swiss dealer.