JC Penney MM3R Handheld Electronic Calculator
date: label: date made
content: ca 1975
name: label: maker
content: J.C. Penney Company
notes: label: Description
content: This four-function calculator has a tan plastic case, an array of ten oval digit keys, and a decimal point key. It also has four blue arithmetic function keys to the right of these and has clear entry and clear keys to the left. A constant switch is above the clear keys. The on/off switch is on the right above the keyboard. A mark to the left of it reads: JCPenney. The eight-digit LED display is at the back. The back edge has a socket for a power adapter.
label: Description
content: A sticker on the back reads: JCPenney (/) Electronic Calculator (/) VOLTAGE 6V CURRENT 0.2A (/) MODEL MM3R SERIAL No. 126131 (/) Made in U.S. A.
label: Description
content: This model is similar to the Commodore MM3R and probably was made by Commodore.
label: Description
content: J. C. Penney is a chain of American department stores.
label: Description
content: Reference:
label: Description
content: Guy Ball and Bruce Flamm, <I>The Complete Collector’s Guide to Pocket Calculators</I>, Tustin, CA: Wilson/Barnett, 1997, pp. 81–82.
label: Location
content: Currently not on view
place: label: place made
content: United States
setName: label: See more items in
content: Medicine and Science: Computers
label: See more items in
content: Computers & Business Machines
label: See more items in
content: Handheld Electronic Calculators
creditLine: label: Credit Line
content: Gift of John B. Priser
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.0988.271
label: catalog number
content: 1986.0988.271
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
physicalDescription: label: Physical Description
content: plastic (case; display cover; keys material)
label: Physical Description
content: gallium arsenide (display chips material)
label: Physical Description
content: metal (circuitry material)
label: Physical Description
content: paper (sticker material)
label: Measurements
content: overall: 2.5 cm x 7.4 cm x 10 cm; 31/32 in x 2 29/32 in x 3 15/16 in