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Russian "Original Odhner", c. 1905...
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Thacher's Calculating Instrument, 1881...
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14 Calculating Tools...
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Calculating Drum "Loga", c. 1930...
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"Certa" Adding Machine...
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"Diera", 1906...
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"Adix" (Model 1)", 1903...
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"Thomas' Arithmomètre", c. 1876...
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"X x X", 1906...
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Collection of 11 "Abacus"...
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4 Logarithmic Calculating Devices...
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3 "Mercedes Euklid" Electrical Calculators, c...
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"Doppel-Brunsviga Mod. 13 ZK", c. 1932...
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Groups of Calculating Tools in 2 Showcases...
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Rare Demonstration Model of the "Original Bur...
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6 Spokewheel Calculating Machines...
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2 "Comptator" Pocket Calculating Machines, c....
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"Triumph Adding Machine", 1910...
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Burroughs Class 1 Style 6 Adding Machine, c. ...
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7 Mechanical Calculating Machines...
