4th century AD. A plano-convex stamp seal accompanied by a museum-quality impression and a typed and signed scholarly note issued by the late A.D.H. Bivar, Professor of Iranian Studies at the School of Oriental and African Studies, University of London, which states: 'Ellipsoid, red jasper, speckled with white. Human-headed, crowned bull, 'Gopatshah', couchant to right. The subject, not uncommon on Sassanian seals, is probably inspired by the Gate of Xerxes at Persepolis. Pahlavi inscription starting at 4 o'clock: 'pst'n 'L yzd', 'Reliance on God'. The inscription is explicitly monotheistic in form. An interesting piece, both technically and iconographically. About 4th century AD.' 5.9 grams, 18mm (3/4"). From the Empire collection, an important UK private collection of seals, acquired between 1980-1983; accompanied by a copy of a typed and signed scholarly note, by the late Adrian Hugh David Bivar, Professor of Iranian Studies at the School of Oriental and African Studies, University of London; this lot has been checked against the Interpol Database of stolen works of art and is accompanied by AIAD certificate number no.10149-167590.