Burroughs Class 4 1000 hand operated adding and listing machine with keyboard for Sterling currency 1925-1935
Double Slide Rule (dated 1815), inscribed on one side EXCHANGES BULLION ETC; PULISHED BY W.CARY - 182 STRAND, APR.1.1815; on other side WEIGHTS AND MEASURES AND COINS; PUBLISHED BY W. CARY - 182 STRAND, APR.24.1.1815. Printed on paper, varnished and mounted on mahogany Double Slide Rule (dated 1815) 1815-1820
Boots Ring Plan Standard 5-inch slide rule with plastic sleeve and instructions Boots Ring Plan Standard 5-inch slide rule 1970-1980
Holtzapffel's "Library sketching or pocket-book scale", with descriptive leaflet, date 1849 Holtzapffel's "Library sketching or pocket-book scale" 1849
Sheet giving an example of work performed on Burroughs class 11 machine at H.M. Nautical Almanac Office, Greenwich Sheet giving an example of work performed on Burroughs class 11 machine at H.M. Nautical Almanac Office 1929
Brunsviga manual calculator model B 13RM ser.no.16459 by Olympia Werke AG, Wilhelmshaven but made in Spain. Brunsviga manual calculator model B 13RM ser.no.16459 by Olympia Werke AG 1965-1975
Slide rule for triangle-mesh-reinforced concrete slabs, celluloid, copyright 1909 by the American Steel and Wire Company Slide rule for triangle-mesh-reinforced concrete slabs 1909-1915
Lagomarsino-Numeria manual calculating machine, model 5903, serial no. 072327; made in Italy Lagomarsino-Numeria manual calculating machine 1960-1970
Fuller's spiral slide rule, no. 849, made by W.F. Stanley, with an instruction booklet George Fuller's spiral cylindrical slide rule circa 1880
Electromechanical calculating machine by Heinrich Diehl GmbH, Nuremberg, model EVM 18, " Archimedes Lizenz", serial no. 18851 Electromechanical calculating machine by Heinrich Diehl GmbH 1955-1965
Burroughs accounting or bookkeeping automatic (electrically driven) for pound Sterling by Burroughs, UK, serial no. C3-787064. Burroughs accounting or bookkeeping automatic (electrically driven) for pound Sterling by Burroughs 1930-1940