Brain models of frog around 1960

Old and rare teaching material (display model, anatomical model) from the Zieglerschen series according to Prof. Dr. Wiedersheim "Brain Models of Vertebrates"; original around 1960; No. 5 - Rana Frog; Dimensions with stand: 21.5 cm; Condition: good; German Hygiene Museum Dresden - GDR; painted, probably made of plaster; light blue round stand; traces of use according to age