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Title: "Unitas" calculating machine, Thomas de Colmar type with two [Go to resource]
Description: "Unitas" calculating machine, Thomas de Colmar type with two slides and lid. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: calculating machine (arithmometer) Temporal: 1909-1909 Source: Science Museum Creator: Ludwig Spitz and Co G.m.b.H. Identifier: 1909-167 Go to resource More Like this...
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