Two planimeters: Coradi Zurich 1900 and Planimeter Polar PP-2k - USSR 1958 1. Planimeter G. Coradi Zurich Switzerland 1900, on the box the coat of arms of the Russian Empire, the sign of the supplier to Russia: "G. Gerlach Varsovie" Historical reference: G. Gerlach (Gustav Gerlach) is a German engineer and entrepreneur who moved in 1845 from Berlin to Warsaw. In 1852, he launched the G. Gerlach Special Geodetic Instrumentation Plant on the basis of a factory opened in 1816 by engineer Joseph Migdalskiego. He received a large order from the Russian government for the supply of theodolites and planimeters for the construction of the Trans-Siberian Railway. The size of the box - 23х8х4,5 см Weight - 490gram 2. Planimeter Polar PP-2k - USSR 1958 Moscow factory of Fine Mechanics «Geoinstument» Good condition, in an original wooden box. The planimeter is used for mechanical measurement of areas in maps, planes, twists. The size of the box - 26x10x4 cm Weight - 700gram