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Showing results for tags 'mathematical'.
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Hello to all of you! I'm from Poland. I'm new here, and i would like to find some information about this stuff. While cleaning the basement i've found box with pencilcases on the photos. I have 5 of them sealed and one was slightly damaged. There are mathematical instruments as on photos. Do you know something about them? When they were made, sold, or are they valuable? Thanks for all the answers