Watch List notes:

ISLAMIC, Egypt. Uncertain. Circa 8th-10th centuries. Glass Vessel stamp (20mm, 2.08 g, 0h). Uncertain word ('b[...])/mr and uncertain word in Arabic in two lines; all with double linear and pelleted border / Blank. Cf. Miles, Early 35 (for type). Intact, light brown hue, rough .

Reportedly purchased from Sotheby's in the 1980s.