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3 Calculating Discs...
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8 Calculating Clocks and Discs...
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Slide Rules and Arithmetic Tables...
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3 Sectors and a Rule...
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Rare Saxonia 3 (Rolltop) Calculator, 1910...
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Calculating Machines and Calculating Aids...
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Calculating Machines and Calculating Aids...
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Burkhardt Arithmometer, c. 1902...
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Calculator Eclair, c. 1920...
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6 Disc Adders...
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Magic Wand by Max Levi, c. 1920...
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Curta Type II Calculator, 1966...
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2 Comptometer Calculating Machines and a Shar...
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Calculating Machines and Calculating Aids...
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4 Toothed-Bar and Chain Adders...
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The Brical - Money Calculating Machine, c. 19...
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2 Adix Adding Machines...
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Diera Calculating Machine, 1911 onwards...
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Hart’s Mercantile Computing Machine, 1878...
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French Specialized Tachylemme Calculator, 187...
