Large Important Early Roman Sard Intaglio

Zeus Serapis seated in a landscape with sphinx
Third quarter of the 1st Century AD
Height: 5.8 cm. (2 5/16 in.)
Ex: private Middle Eastern collection, 1970's
Published: van den Hoek, Annewies; Pottery Pavements and Paradise. Iconographic and Textual Studies on Late Antiquity (Amsterdam, 2013) p.505
Antiquarium Ltd.; Ancient Treasures VI (New York, 2008) p.33
cf: Zwierlein-Diehl, Erica ; Die Gemmen und Kameen des Dreikönigenschreines.Der Dreikönigenschrein im Kölner Dom (Koln, 1998) pp.199-204; no.65.(likely by the same hand)
#5536