£600
A Curta Type 1 Calculator, Liechtenstein, mid-20th century No. 11276, the stepped gear-type pocket calculator engraved CURTA to the screw lid, the base reading System Curt Herzstark, Type I No. 11276 with central label, the calculator in original drum carrying case with instruction manual, 11cm high, together with a cased slide rule and copy of HOARE, Charles, 'The Slide Rule', London 1914. (3)
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