Johnston Adding Machine, Model A11

Description:

This gray mechanical 10-key adding machine was manufactured by Johnston Adding Machine Company of California. It is a model A11 Adder with 10 white number keys and 6 red function keys. The machine could add, subtract, and multiply as well as print a paper tape. Its cover is hinged and opens to reveal the calculating mechanisms, the ribbon and platen for printing, and a red knob for advancing the printing paper. Stamped on a metal plate located on the inside right rear is the serial # 11766A11.

Johnston Adding Machine Company was acquired by the Marchant Calculating Machine Company in 1957. The Johnston plant was engaged to produce and distribute the Marchant 10-key adding machine.

See also: 1979.3084.128 Advertisement for Marchant's new adding machine.

1979.3084.023 - .025 Marchant Board of Directors Minutes of Meetings.

Date Made: ca 1956

Maker: Johnston Adding Machine Company

Location: Currently not on view

Subject: Mathematics

Subject:

See more items in: Medicine and Science: Mathematics, Science & Mathematics

Exhibition:

Exhibition Location:

Credit Line: Ernest Eldon Jorgenson

Data Source: National Museum of American History

Id Number: 2017.0315.01Model Number: A11Accession Number: 2017.0315Catalog Number: 2017.0315.01

Object Name: adding machine

Physical Description: metal (overall material)plastic (overall, keys material)Measurements: overall: 19.5 cm x 22.5 cm x 35.5 cm; 7 11/16 in x 8 27/32 in x 13 31/32 in

Guid: http://n2t.net/ark:/65665/ng49ca746b3-fd18-704b-e053-15f76fa0b4fa

Record Id: nmah_1867907

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.