Monroe Model LA 200 Calculating Machine
date: label: date made
content: 1947
name: label: maker
content: Monroe Calculating Machine Company
notes: label: Description
content: This portable, full-keyboard, electric, and non-printing modified stepped drum calculating machine has a gray steel case and gold and white color-coded plastic keys. The ten columns of keys have nine digit keys and one zeroing key in each column. The zeroing key is the opposite color from the rest of the keys in the column. Between the columns of keys, and under the plate, are metal rods visible through windows in the plate. These rods, painted green on one side and red on the other, serve as decimal markers.
label: Description
content: To the right of the number keys are two red buttons, one of which is marked R (for use in repeated addition or subtraction), and a red clearance key. A crank on the right side rotates clockwise for addition and counterclockwise for subtraction. Above these are black subtraction and addition bars.
label: Description
content: In back of the keyboard is the carriage, with 20 result dials and ten revolution register dials. Each revolution register dial is numbered from 0 to 9 in black and from 1 to 9 in red. Between the two registers on the carriage are two thin metal rods that carry green plastic decimal markers. A crank for clearing the carriage is on its right side. A carriage shift crank is at the front.
label: Description
content: The machine may be operated automatically by plugging in the gray rubber two-pronged cord that extends from the back. The instrument has four metal feet, a gray plastic cover, and a brown leather-covered carrying case with key.
label: Description
content: The machine is marked on the front: Monroe. No serial number found.
label: Description
content: For related documentation, see 1986.0131.02. Date assigned is copyright date of the instructions.
label: Description
content: This Monroe model L calculating machine is not only electrically operated (hence the A in the model number) but has a 20-digit capacity. Although it has a carrying case (hence the X in the model number), there are no extensible feet in the back, as on the L160-X.
label: Description
content: Reference:
label: Description
content: Monroe Calculating Machine Company, <I>Instruction Book Monroe Adding Calculator LA- Models</I>, Orange, N.J., 1947 (1986.0131.02).
label: Location
content: Currently not on view
place: label: place made
content: United States: New Jersey, Orange
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Calculating Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Stanley E. Whiting
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.0131.01
label: catalog number
content: 1986.0131.01
label: accession number
content: 1986.0131
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: rubber (overall material)
label: Physical Description
content: leather (overall material)
label: Physical Description
content: steel (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 18.5 cm x 37.5 cm x 35 cm; 7 9/32 in x 14 3/4 in x 13 25/32 in