Mousour (Arab Mansur?), 11th century. Seal (Lead, 26 mm, 16.40 g, 12 h). O A / Π/Є-T/P/O/C ("Saint Petros") Nimbate bust of St. Peter facing, holding long cross in his right hand. Rev. +KЄ BO/HΘI TⲰ CⲰ / ΔΛⲰ Μ૪/COVP+ ("Lord, help your servant Mousour") in four lines. Unpublished in the standard references. Very fine.
This seal apparently belongs to a person named Mousour, perhaps a Greek rendition of the Arab name Mansur.