Model II
Model II: 25 copies between 1926 (Barmen) and 1939 (Pittsburgh).
"Dumbell style", 1.7 tons, 5m hight, northern + southern hemisphere.
- 1926: Barmen, Leipzig, Jena, Dresden, Berlin
- 1927: Mannheim, Nuremberg, Vienne, Düsseldorf
- 1928: Hannover, Stuttgart, Rome
- 1929: Moscow
- 1930: Hamburg, Chicago (Adler), Milan, Stockholm
- 1933: Philadelphia (Fels)
- 1935: Los Angeles (Griffith), Brussels, New York (Hayden)
- 1938: Tokyo
- 1939: Pittsburgh (Buhl)
Model III
Model III: improved model II at Oberkochen (after the WWII), except for Adler (Chicago): this work was performed by their technician (a former Zeiss employee).
- 1957: Sao Paulo
- 1960: Johannesburg, (from modell II Hamburg)
- 1961: Adler, Chicago (from the same place), until December 31, 1969
- 1967: Baton Rouge, (from model II Griffith)
More
- Glenn A. Walsh, The mystery of the Zeiss II from Adler (Chicago), blog online, 2020
- Glenn A. Walsh, History of the Buhl Planetarium (Pittsburgh), online, 1999-2020