Watch List notes:

Constantine X Ducas, 1059-1067. Histamenon (Gold, 25 mm, 4.39 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 collection of W. Belser, Zürich, prior to 1965, and that of his son, acquired in the early 1970s.