Stack's, The Golden Horn Collection, Lot 3261 Isaac I Comnenus (1057-1059).
Histamenon. Constantinople. + IhS XIS PCX RCGNΛNTI hM (first h retrograde). Christ seated on backless throne facing, bearded, with cross nimbus, wearing chiton and himation, raising hand to side in benediction and holding Gospels by spine. Rv. + ICΛΛKIOC RΛ C IΛЄVC PωM'. Isaac standing facing, bearded, wearing cr...