200001259, Tassie, 1259, TWO HORSEMEN (DIOSCURI - DANUBE HORSEMEN) WITH SPEARS, FACING EACH OTHER, WEARING PERSIAN CAPS AND CLOAKS, GROUNDLINE., Tassie, J.; Raspe, R.E.: A Descriptive Catalogue of a General Collection of Ancient and Modern Engraved Gems,... (1791), 108,NO.1259,TRAY 21.1, 21.3, Cornelian