Addometer adding machine with eight stylus-operated dials, c 1925.

Made:: 1900-1920 in Chicago

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Addometer adding machine with 8 stylus-operated dials, made by the Reliable Typewriter and Adding Machine Co., Chicago, in case with instruction sheet.

Addometer adding machine c.1925 with instruction sheet. Made by the Reliable Typewriter and Adding Machine Company of Chicago, USA, the Addometer was a popular adding machine based on Blaise Pascal's (1623-1662) design of 250 years earlier.

Details

Category:: Mathematics

Object Number:: 1989-600

type:: adding machine (stylus)

credit:: Auction Team Koln

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Parts

Addometer adding machine with 8 stylus-operated dials

Addometer adding machine with 8 stylus-operated dials, made by the Reliable Typewriter and Adding Machine Co., Chicago. No 2398 is engraved on the side.

Measurements:: overall: 10 mm x 295 mm x 60 mm, 0.42 kg

Materials:: brass (copper, zinc alloy) , steel (metal) , metal (unknown) and plastic (unidentified)

Object Number:: 1989-600 Pt1

type:: adding machine (stylus)

Case for Addometer adding machine

Leatherette case with instruction sheet for Addometer adding machine with 8 stylus-operated dials, made by the Reliable Typewriter and Adding Machine Co., Chicago.