SCM Marchant Model 10CMF Calculating Machine

This full-keyboard, non-printing electric proportional gear calculating machine has a metal frame painted two shades of gray and ten columns of gray and light gray color-coded round plastic number keys. To the right of the keyboard are a variety of charcoal-colored function keys, including a key lock key that is not found on the model 10CM. Right of these is a column of square plastic keys used in multiplication. Above these is a lever not found on the 10CM. Right of these keys is an on-off switch. To the left of the number keys is a charcoal-colored unlock key. A row of ten dials behind the number keys shows the number entered.
A movable carriage behind the entry register has a 20-window result register with a 11-window revolution counting register behind it. A row of metal flaps under both registers on the carriage provides decimal markers. Under the decimal markers for the revolution register are ten rectangular buttons. On the right of the carriage is an unlock lever.
A mark on the carriage reads: SCM MARCHANT. The serial number, on a metal tag attached at the base, is 10CMF-676586
The donor was a certified public accountant who had a collection of calculating machines. The date of manufacture and original cost ($880) are provided by him.
SCM, "SCM Marchant Model Consolidation Service Instruction," 1962, p. VII (1979.3084.65).
Accession file.
Currently not on view
Object Name
calculating machine
date made
SCM Corporation
Physical Description
metal (overall material)
cork (overall material)
plastic (overall material)
overall: 23 cm x 42 cm x 41 cm; 9 1/16 in x 16 17/32 in x 16 5/32 in
ID Number
accession number
maker number
catalog number
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Calculating Machines
Data Source
National Museum of American History, Kenneth E. Behring Center


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