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 and ten columns of light green and dark green plastic number keys, with a blank key at the bottom of each column. Columns of keys are colored in groups of three. Metal rods between the columns turn to indicate decimal places. On the right are two columns of blue function bars and keys.
A nine-digit register on the left indicates numbers entered for multiplication. Below it is a block of nine light green digit keys, with a 0 bar below. These are surrounded by further levers and function keys. The machine is decorated with streamlines around the corners. It has four rubber feet.
Behind the number keys is a movable carriage with an 11-digit revolution register and a 21-digit result register. The result register has plastic buttons above it that can be used to set up numbers. Ten numbered buttons are under the revolution register. Zeroing knobs for the registers are on the right of the carriage. Decimal markers slide on bars between the registers on the carriage.
A mark inside an opening on the bottom reads: ST10-169028. The sides are marked: FRIDEN. A cord marked “MONROE” was received with the machine.
Compare 1984.3079.01, 1984.3079.02, 1984.3079.03, and MA.335421.
Date from Jorgenson.
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 (now named the U.S. Department of Veterans Affairs) for the rest of his life.
E. Jorgenson, Friden Age List Office Machine Americana, p. 1.
Currently not on view
date made
Friden, Inc.
place made
United States: California, San Leandro
Physical Description
metal (overall material)
rubber (overall material)
plastic (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
overall: 39 in x 39 in x 24 in; 99.06 cm x 99.06 cm x 60.96 cm
ID Number
nonaccession number
maker number
ST 10 169028
catalog number
Credit Line
Gift of Vincent L. Corrado
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Calculating Machines
Data Source
National Museum of American History