Watch List notes:

ISLAMIC, Commercial Weights. 'Abbasid Egypt. Circa 8th century or later. Glass Quarter Ratl Ring Weight. Large rounded quadrate glass weight with trace of stamp at top and central hole for suspension. Overall dimensions: approximately 50mm wide at base, tapering to approximately 30mm at top; 44mm high; approximately 25mm thick. Weight: 89.90. Cf. Eldada, Glass 89; cf. Münz Zentrum XXXVII, lot 4217 (both refs for type). Intact, translucent violet and dark brown hue, traces of iridescence and earthen deposits with some surface roughness .