Watch List notes:

Uncertain. 13th century. PB Seal (31mm, 22.45 g, 12h). St. John the Forerunner (= the Baptist), standing facing, pointing up and holding cross-tipped staff; O A/ГIOC/Iω (macron above) to left; П/[O]/(ΔPM)/O/C to right / ΨVΧH C(OY)/AC ΦP(OY)PON C/ ГPAΦωN/ЄI KAI KAT/ωПA(HN)/[...]VXHC ΠAЄ/ON. Dark gray-brown patina. VF.

From the Exarch Collection.