Object Details
maker
APF Electronics
Description
This relatively early, relatively large, handheld electronic calculator has an array of nine digit keys with a zero bar and a decimal point key below. To the right are clear entry, clear, multiplication, division, addition, and subtraction keys, as well as an equals bar. Sliding the on/off switch to the on position opens a window to reveal the eight-digit fluoresent tube display.
A mark at the top front reads: aPF Mark V. A metal plaque on the back has the title: OPERATING INSTRUCTIONS. It reads in the bottom right: JAPAN. A mark scratched below the plaque reads: M. R. (/) Williams. A sticker attached to the cover for the batteries reads: A.P.F. ELECTRONICS, INC. (/) MODEL NO. MARK-V (/) D.C. 6.0 VOLTS (4 TYPE C-CELLS) (/) CAUTION - USE ONLY MODEL (/) M5 AC ADAPTOR (/) SERIAL No. 27680 JAPAN.
The microprocessor inside the calculator is marked: TMS0101ANC[delta] (/) 7305. this indicates that the chip was made in the fifth week of 1973. It also has the logo of Texas Instruments. A mark on the back of the circuit board reads: MODEL PB-5001 E46473. A mark on the fluorescent tube reads: Toshiba (/) 6520 (/) . . .
A 1973 advertisement in the New York Times lists the calculator as selling, with power adapter, for $79.95. This example has no power adapter.
Reference:
New York Times, May 6, 1973, p. 46.
Location
Currently not on view
Credit Line
Gift of Michael R. Williams
date made
ca 1973
ID Number
1989.0047.01
catalog number
1989.0047.01
accession number
1989.0047
Object Name
electronic calculator
Physical Description
plastic (case; keys material)
aluminum (fittings material)
metal, plastic (circuits material)
Measurements
average spatial: 3.8 cm x 12.2 cm x 19 cm; 1 1/2 in x 4 13/16 in x 7 15/32 in
place made
Japan
See more items in
Medicine and Science: Mathematics
Computers & Business Machines
Handheld Electronic Calculators
Data Source
National Museum of American History
Link to Original Record
Record ID
nmah_1064479