★ Ex Sotheby's , 3-4 October 1991, 177 ★

Isaac I Comnenus, 1057-1059. Tetarteron (Gold, 21 mm, 4.00 g, 7 h), Constantinopolis. +I ҺZ XIS RCX RCςNANTIҺm Nimbate bust of Christ facing, wearing tunic and pallium, raising his right hand in benediction and holding book of Gospels in his left. Rev. +ICAAKIOC RACIΛЄVC PM Isaac I Comnenus, bearded, standing facing in military attire, wearing crown with pendilia, holding globus cruciger in his right hand and placing his left on scabbard. DOC 3. SB 1845. Rare. Very fine.

Ex Sotheby's , 3-4 October 1991, 177.