National Model 9H Adding Machine

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This full-keyboard printing manual adding machine has a tan metal frame, a metal mechanism, and green and white plastic keys on a light green plastic keyboard. It has eight columns of keys and has an operating by a handle on the right side. Subtraction and repeat levers are next to the keyboard, as is a clearing button. Total/subtotal and non-add levers are next to the handle.
The ribbon and the printing mechanism are exposed. The paper tape is released by a lever on the right, advanced by a roller on the right, and torn off using a serrated edge along the top of the paper guide. The machine prints results up to eight digits long. Using a lever on the tip left side, paper advance may be set at nonprint, one space, two spaces or total space.
The machine is marked at the front: National. The serial number, impressed on a metal tag attached to the front at the base is: 9H 309035. A mark on the back reads: MANUFACTURED AT (/) ITHACA, NEW YORK U.S.A. BY THE (/) ALLEN-WALES ADDING MACHINE DIVISION OF (/) THE NATIONAL CASH REGISTER COMPANY (/) DAYTON, OHIO, U.S.A. (/) National.
The machine was given to the Smithsonian by Leona T. Feldman of Philadelphia, and used by her father in his law office. Her father was most probably lawyer David N. Feldman (1896-1987).
Accession file.
Currently not on view
date made
Allen Wales Adding Machine Division, the National Cash Register Company
place made
United States: New York, Ithaca
Physical Description
paper (overall material)
plastic (overall material)
metal (overall material)
rubber (overall material)
overall: 23.3 cm x 31 cm x 44.5 cm; 9 3/16 in x 12 7/32 in x 17 17/32 in
ID Number
catalog number
accession number
Credit Line
Gift of Leona T. Feldman
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History


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