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We have for sale a 1932 Keuffel and Esser Planimeter
Wonderful Planimeter measuring tool used before the days of computers.
A planimeter is a table-top instrument for measuring areas, usually the areas of irregular regions on a map or photograph. Made by Keuffel and Esser Company of New York. model No. 4236, S.N. 59843
Thank you to the American Mathematical Society for information and photos.
http://www.ams.org/publicoutreach/feature-column/fcarc-surveying-two
Circa, 1932
Measurements, case 9.25” x 3.25” x 2”
Condition, very nice condition, case is worn on bottom.
Please see all pictures as they are part of the description.
To see more of our wonderful Antique and Vintage Industrial, Railroad and Tools click the link below to go to our Etsy store.
https://www.riverratantiques.com/shop/14679344/industrial-railroad-tool
Sku# 5239
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