R. C. Allen Model 3089 Adding Machine

This adding machine has a black metal frame with a metal mechanism and small glass window. The keyboard is also metal, painted green. There are eight columns of color-coded black and white plastic keys for entering numbers. To the right are the subtotal/total key mechanism, and the addition, subtraction, correction, and repeat keys. On the left are the non-print and non-add keys. The printing mechanism, fixed carriage, and narrow paper tape (4 inches wide) are at the back. It can accommodate totals up to nine digits long. There is a serrated metal edge for tearing off the tape. When the tape guide is moved away, single sheets of paper 6 inches wide can be fed through the platen. A knob on the right of the roller advances the paper manually. A lever on the right of the platen releases the paper and locks the paper guide in place. The motor and electric cord are at the back.
The machine is marked on the front and on the top: R.C. Allen (/) FIGURING MACHINES. It is marked on a metal tag attached to the bottom: MODEL 3089. It is marked on another metal tag attached to the bottom with serial number: 997586. It is stamped on the bottom: 1306. It is marked on the back: Allen CALCULATORS, INC. (/) NEW YORK, U.S.A. (/) PATENTED. It is marked on the cover: R.C.Allen (/) Business (/) Machine.
R. C. Allen adding machines were made from 1934, but the Model 3089 was not manufactured in that year. It was available by 1939.
American Office Machines Research Service, December, 1939, Section 3.29.
Currently not on view
Object Name
adding machine
date made
ca 1940
Allen Calculators, Inc.
Physical Description
glass (overall material)
plastic (overall material)
metal (overall material)
paper (overall material)
rubber (overall material)
overall: 25 cm x 25 cm x 45 cm; 9 27/32 in x 9 27/32 in x 17 23/32 in
place made
United States: New York
ID Number
catalog number
accession number
Science & Mathematics
Adding Machines
See more items in
Medicine and Science: Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of KHG, Inc.
Additional Media

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.