200000534, Tassie, 534, MAGIC GEM: GREEK INSCRIPTION, OUROBOROS, Lippert, Ph.D.: Dactyliothecae universalis... (1755, 1756, 1752), Moszynski, (August Fryderyk), commissioner of the Royal Mint, Poland, Tassie, J.; Raspe, R.E.: A Descriptive Catalogue of a General Collection of Ancient and Modern Engraved Gems,... (1791), I. 897, Chalcedony

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