Calculator; Keuffel & Esser, Thachers, Model 4012, Case.
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Measure; Ross Mensuration Blocks, Boxed Set.
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Calculator; Stanley (London), Cylindrical, Logarithmic Scale, Case, 17 inch.
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Calculator; Keuffel & Esser, Thachers, Case.
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Calculator; Payen (L), Arithmometer, 8 Slides, 16 Digit, Oak Case, 23 inch.
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Calculator; Egli (Hans), Millionaire, 8 Slides, 16 Digit, Table, 26 inch.
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Calculator; Napier's Bones, Box & Rods, Carved Boxwood, 4 inch.
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Calculator; Grimme Natalis & Co, Brunsviga Midget, 9 Set Levers, 18 Digit Register.
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Calculator; Stanley, Fuller, Model 1, Mahogany, Box, Manual, 17 inch.
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Calculator; Stanley, Fuller, Mahogany, Box, Manual, 17 inch.
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Computer; Apple I, Motherboard, Keyboard, Monitor, Operational, Manual, BASIC User's Manual, 15 inch.
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Calculator; Contina, Curta Type II, Case, 4 inch.
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Calculator; Abacus, Painted Ash Poplar & Pine, Polychrome Counters, Pedestal; Base, 59 inch.
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Calculator; Keuffel & Esser, Thachers, Case.
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Slide Rule; Picket, Demonstration, Wood Laminate, 4 ft.
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Calculator; Burroughs, Adding Machine, Electric.
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