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Fowler's Long Scale Calculator - Ridai Museum of Modern Science, Tokyo - DSC07486

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Brunsviga calculator, Grimme, Natalis & Co., Braunschweig - Ridai Museum of Modern Science, Tokyo - DSC07598

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Facit CA 1-13 calculator - Ridai Museum of Modern Science, Tokyo - DSC07632

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Calculating machine replica, Blaise Pascal, c. 1642, TM21265 - Tekniska museet - Stockholm, Sweden - DSC01564

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Tiger Calculator E67-21 - Ridai Museum of Modern Science, Tokyo - DSC07613

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Ideal Calculating Machine, Maruzen Co., Ltd., Tokyo - Ridai Museum of Modern Science, Tokyo - DSC07604

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Pin-wheel mechanical calculating machine, Odhner 200, manufactured 1955-1967 AD, TM44856 - Tekniska museet - Stockholm, Sweden - DSC01570

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Professor Fuller's Calculating Slide Rule - Ridai Museum of Modern Science, Tokyo - DSC07496

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Brunsviga 10 calculator, Braunschweig, 1932 AD - Braunschweigisches Landesmuseum - DSC04902

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