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| View Original: | Pilot P1 calculator - Ridai Museum of Modern Science, Tokyo - DSC07609.JPG (4495x3506) | |||
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| Keywords: Pilot P1 calculator - Ridai Museum of Modern Science, Tokyo - DSC07609.JPG en Exhibit in the Ridai Museum of Modern Science Tokyo University of Science Kagurazaka campus - 1-3 Kagurazaka Shinjuku-ku Tokyo 2015-02-20 02 15 54 own Daderot other versions cc-zero Mechanical calculators in the Ridai Museum of Modern Science Pilot calculators | ||||
