Wales Model 10 Series Adding Machine

This full keyboard printing manually operated adding machine has a metal frame painted black with glass right and left sides and front and a glass panel in front of the number dials behind the keyboard. Below the nine columns of black and white color-coded plastic keys, the keyboard below is covered with green felt. A total key is to the left of the keyboard, a red plastic error key and a key stem areabove the number keys, and non-print and non-add keys are behind the numeral dials. Divisions for U.S. currency are indicated between the dials. The metal operating crank is on the right. At the back of the machine is the printing mechanism and a 13-inch (33 cm.) movable carriage. The machine is extremely heavy.
A mark on the front reads: WALES. A mark above the keyboard reads: WALES [/] Visible [/] Adding [/] and Listing [/] Machine [/] THE ADDER MACHINE COMPANY [/] WILKES-BARRE, PA.,U.S.A. A list of patents includes the first date DEC. 1. 1903, and the last date, NOV. 23. 1909.
Compare MA*323593.
J. H. McCarthy, American Digest of Business Machines, Chicago, 1924, pp. 544-545.
Currently not on view
Object Name
adding machine
date made
Adder Machine Company
Physical Description
plastic (overall material)
glass (overall material)
metal (overall material)
rubber (overall material)
felt (overall material)
overall: 29 cm x 33 cm x 52 cm; 11 13/32 in x 13 in x 20 15/32 in
place made
United States: Pennsylvania, Wilkes-Barre
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 Gene Barber
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.