Friden Model ST 10 Calculating Machine

Friden Calculating Machine Company produced its “Supermatic Tabulating” model from about 1940 through 1949. This full-keyboard, non-printing electric stepped drum calculating machine has a gray metal frame. The ten columns of light green and dark green plastic number keys each have a blank key at the bottom. They are colored in groups of three columns. Metal rods between the columns turn to indicate decimal places.
On the right are two columns of blue function bars and keys, including a key for division tabulation. This key is not found on the model S. On the left is a nine-digit register that indicates numbers entered for direct multiplication. Below it is a block of nine light green digit keys, with a 0 bar below, for entering the multiplier. These are surrounded by further levers and function keys.
Behind is a movable carriage with an 11-digit revolution register and a 21-digit result register. The result register has plastic buttons above it used to set up numbers. Ten numbered buttons are under the revolution register. Zeroing knobs for these registers are right of the carriage. Decimal markers slide on bars between the registers on the carriage. The cover has streamlines on the back and at the bottom corners. The machine has four rubber feet and a cord.
A mark on the sides reads: FRIDEN. A mark inside an opening on the bottom reads: ST10-192804. A mark on the cord reads: MONROE.
Compare 1984.3079.01, 1984.3079.02, 1984.3079.03, and MA*335421.
This is one of five Friden calculating machines given to the Smithsonian by Vincent L. Corrado (1917-1984), a native of Covington, Kentucky, who earned bachelor’s and master’s degrees in accounting at Catholic University, served in the U.S. Army from 1942 through 1973, and then joined the Veterans Administration for the rest of his life.
Date from Jorgenson.
Ernie Jorgenson, Friden Age List, Office Machine Americana, p. 1.
Currently not on view
Object Name
calculating machine
date made
Friden, Inc.
Physical Description
plastic (overall material)
metal (overall material)
rubber (overall material)
overall: 20.8 cm x 45.4 cm x 34 cm; 8 3/16 in x 17 7/8 in x 13 3/8 in
place made
United States: California, San Leandro
ID Number
catalog number
nonaccession number
maker number
ST 10 192804
Science & Mathematics
Calculating Machines
See more items in
Medicine and Science: Mathematics
Calculating Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Vincent L. Corrado

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