This ten-key printing electric adding machine has a grayish tan metal casing, a paper tape, and nine white plastic numeral keys, arranged on a block, with zero bar below. Above the number keys is a place indicator with clearance bar. Other keys are marked X, +, -, #, and *. One key is marked with a diamond. The machine has a tan cord, a paper tape 2 3/8” (6 cm.) wide, and a gray cover. The rightmost printwheel prints special characters. A latch releases the lid to reveal the mechanism, the platen, the printwheels, and the two-color ribbon. A serrated plastic edge helps users tear off the paper tape. A lever on the top left releases the tension on the platen.
The machine is marked on the back: Comptograph. It is marked on a metal tag on the inside right: Mod. 2205 No 125253. It is marked on a paper tag on the bottom: MADE IN (/) WESTERN GERMANY. It is marked on the plastic cover: LEON (/) Office Machines Co., Inc. (/) 625 F. Street, N.W. Washington, D.C. (/) REpublic 7-3145.
The machine was used by the donor’s husband when he was working in lingerie manufacture in Richmond, Va.
Accession file.
Currently not on view
date made
ca 1962
place made
Physical Description
metal (overall material)
paper (overall material)
plastic (overall material)
overall: 19 cm x 24.5 cm x 39 cm; 7 15/32 in x 9 21/32 in x 15 11/32 in
ID Number
maker number
accession number
catalog number
Credit Line
Gift of Diane S. Landsberger
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History


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