Object Details
- Description
- This full-keyboard, non-printing electric proportional gear calculation machine has a metal frame painted two shades of gray, and ten columns of color-coded gray and light gray round plastic digit keys. To the right of the keyboard are a variety of charcoal-colored function keys. Right of these is a column of square plastic keys used in multiplication. Right of these keys is an on-off switch. Behind the digit keys is a row of ten dials showing the number entered.
- The movable carriage behind the entry register has a 20-window result register and a 10-window revolution counting register. Under the windows of both of these registers is a row of metal flaps used as decimal markers. Under the decimal markers for the revolution register are ten rectangular buttons.
- A mark on the left of the carriage reads: SCM MARCHANT. A metal tag attached to the bottom gives the serial number 10CM-671351. A paper tag on the bottom has a list of United States patent numbers, the most recent of which is 2973981. A mark on the back reads: FICA (/) 63180. A nearby mark reads: SCM.
- The donor, a certified public accountant, had a collection of calculating machines. He indicated that the machine was manufactured in 1963 and originally cost $755.
- Reference:
- Accession File.
- Location
- Currently not on view
- Data Source
- National Museum of American History
- date made
- 1963
- Credit Line
- Gift of William L. Jackson
- Physical Description
- metal (overall material)
- plastic (overall material)
- Measurements
- overall: 22 cm x 42 cm x 41 cm; 8 21/32 in x 16 17/32 in x 16 5/32 in
- Object Name
- calculating machine
