Digitrex MCK-8 Handheld Electronic Calculator
date: label: date made
content: 1972
name: label: distributor
content: Digitrex
notes: label: Description
content: This small, chunky four-function calculator has fifteen square plastic keys, zero and decimal point bars, and rectangular on and constant (K) keys. In addition to digit and arithmetic function keys, there are clear and clear entry keys. The subtraction key serves as a difference key and the plus key as a total key. At the back is an eight-digit LED display. A tag next to the display reads: Digi (/) trex.
label: Description
content: A sticker on the back of the case reads: MCK8 OPERATING INSTRUCTIONS. A sticker atop this reads: MADE IN U. S. A. – FO[. . .] (/) CIMATRON Co. (/) by R B. M. [sic] Corp. (/) Serial #MCK-8 403565. A socket at the top allows for recharging the batteries.
label: Description
content: The leather-covered, velvet-lined case for the calculator is like a jewelry box.
label: Description
content: Compare Hapco Porta Mark II.
label: Description
content: Digitrex sold a desktop printing electronic calculator in 1974. R.B.M. Corporation, a firm in Arlington, Texas, sold the Scientific calculator around 1973.
label: Description
content: References:
label: Description
content: Guy Ball and Bruce Flamm, <I>The Complete Collector’s Guide to Pocket Calculators</I>, Tustin, CA: Wilson/Barnett, 1997, p. 68.
label: Description
content: The Vintage Calculators website describes the Hapco Porta Mark II, RBM Scientific.
label: Description
content: <I>Los Angeles Times</I>, January 22, 1974, p. B4.
label: Location
content: Currently not on view
place: label: place made
content: United States: Texas, Arlington
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: 1986.0988.268
label: catalog number
content: 1986.0988.268
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
physicalDescription: label: Physical Description
content: metal (keyboard; tag; circuitry; case trim material)
label: Physical Description
content: plastic (case; keys; display cover material)
label: Physical Description
content: paper (sticker material)
label: Physical Description
content: leather (case cover material)
label: Physical Description
content: cloth (case lining material)
label: Measurements
content: overall: 1 1/8 in x 3 in x 4 in; 2.8575 cm x 7.62 cm x 10.16 cm