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Description: | PLUS (trade name on the front of the machine). BELL PUNCH COMPANY LTD 39 ST JAMES'S ST LONDON PLUS GUARANTEED WHOLLY MADE IN GREAT BRITAIN (embossed on makers trade plate on back of machine). Large advertising plate on the base of machine includes the model 509 S and serial number 88.994. MANU Bell Punch Company Ltd circa 1945 The Island, Uxbridge, Middlesex, England DES after LEIBNIZ,Gottfried,Wilhelm. 1671 Mainz, Germany. DES after THOMAS de Colmar, Charles,Xavier,Chevalier. 1818 44 rue Chateaudun, Parios, France. This Plus model 509 S is a direct action keyboard calculator of the "comptometer" type. It has a 6 digit partial keyboard with keys up to the value of 5. This machine model 509 S was designed as a money totaller in pounds shillings and pence but with knowledge can be used as a four rules calculator. It is a pinwheel machine that has no input or revolutions register but has a 10 digit accumulator register. This type of key board machine were often erroneously called comptometers or simply adders. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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