200001246, Tassie, 1246, FACING HEADS OF CASTOR AND POLLUX (DIOSCURI) IN PROFILE, STARS ON THEIR HEADS., Tassie, J.; Raspe, R.E.: A Descriptive Catalogue of a General Collection of Ancient and Modern Engraved Gems,... (1791), 108,NO.1246,TRAY 20.2, 20.4, Sardonyx