Stunning and rare original vintage educational zoological wall chart (Tafel Nr. 20 - "Chelonia. Emys."), masterfully illustrated by the famous Austrian zoologist Prof. Paul Pfurtscheller (1855-1927). The chart focuses on the detailed anatomy of the European pond turtle (Emys orbicularis).This specific specimen is an outstanding example of the highly collectible Martinus Nijhoff international edition . It features the official authentic markings on the lower margin. Bottom left: Zoologische Wandtafeln gezeichnet und herausgegeben von prof. Paul PFURTSCHELLER - Wien (indicating Pfurtscheller's authorship and production in Vienna).Bottom right: The prestigious publisher's logo of Martinus Nijhoff ('s-Gravenhage), featuring the historical Dutch motto "Alles komt terecht".