Live veiling - Lot 475
[Mathematics]
Logarithmic calculating drum.
Zürich, Daemen-Schmid, ca. 1925
Hamerprijs: €
150
€ 180 / 250
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Beschrijving lot
Aluminum drum, 60,5 x 17,5 cm, with slotted cylindrical sleeve, signed "Loga Calculator 15m Patente Daemen-Schmid Uster-Zürich"; the drum covered with paper marked with logarithmic scales (sl. used, paper rubbed and stained).
Without supporting aluminium frame.
Ref. Smithsonian.
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