A Telecrypto 53 electromechanical wheel-based cipher machine, Swiss, circa 1955,
A Hagelin HC-570 Desktop Electronic Cipher machine, Swiss, circa 1980,
A rare Nachet et Fils brass binocular compound microscope, French, circa 1860,
A Jules Duboscq brass colorimeter, French, late 19th century,
A Utzschneider and Fraunhofner 3 1/4-inch refracting telescope on stand, Munich, circa 1825,
A pair of Carl Zeiss high powered binoculars, German, circa 1940,
A part brass compound monocular microscope, Continental, late 18th century,
A J & W Cary 3-inch pocket globe, English, published 1791,
A J & W Cary 12-inch terrestrial globe on stand, English, published 1812,
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