200000775, Tassie, 775, A VASE (AMPHORA) IN THE SHAPE OF BUST OF JANUS BIFRONS (VEILED?), Stosch, (Philipp, Baron), Tassie, J.; Raspe, R.E.: A Descriptive Catalogue of a General Collection of Ancient and Modern Engraved Gems,... (1791), 78,NO.775,TRAY 13.1, 13.3, Red jasper