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Type | Model No. | Maker | Country | Construction Material | Date | Scale Length | Area of Use |
Polar | Coradi - Weber No. 4313 | Coradi | Switzerland | German silver and brass | ca. 1940 | N/A | General area measurement |
Notes: "This polar planimeter was made by G. Coradi in Zurich, Switzerland, and sold by F. Weber & Co., which was and still is a giant in the art supplies business, and for a while ventured into the engineering supplies market, selling slide rules made by Nestler and planimeters by Ott and Coradi."
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