Object Details
- APF Electronics
- Description
- This handheld electronic calculator has an array of ten brown plastic keys for digits and a decimal point. Above these are inversion, squaring, and square root keys. To the immediate left is an x/y exchange key, a percentage key, keys for the four arithmetic operations, and an equals/constant key. Left of these is a clear entry/clear key and a set of five memory keys. A mark above the switch reads: aPF MARK 31.
- Behind the keyboard is an eight-digit display.
- The back of the calculator has a compartment for a battery but no battery or compartment cover. A silver-colored sticker pasted to the back reads: aPF mark 31 (/) SLIDE RULE CALCULATOR. It gives operating instructions. The bottom of this label reads: MARK 31 (/) Model No. It also reads: MT-019962 (/) Serial No. Further text reads: APF ELECTRONICS INC. (/) NEW YORK, N.Y. 10022 (/) MADE IN JAPAN. A mark in the bottom left corner reads: 7545. The top edge of the calculator has a hole for an adapter but no adapter.
- An August 1976 advertisement in the Los Angeles Times lists the APF Mark 31 as on sale for $19.99. An October 1976 advertisement in The Chicago Tribune gives a regular price of $14.95 and a sale price of $13.99. An ad in the Los Angeles Times the same time gives the same prices.
- Compare 1986.0988.083 (the Montgomery Ward P203).
- References:
- Los Angeles Times, August 25, 1976, p. 11.
- Los Angeles Times, October 17, 1976, p. M20.
- Chicago Tribune, October 17, 1976, p. 40.
- Location
- Currently not on view
- Credit Line
- Gift of John B. Priser
- ca 1976
- ID Number
- 1986.0988.168
- catalog number
- 1986.0988.168
- accession number
- 1986.0988
- Object Name
- electronic calculator
- Other Terms
- electronic calculator; Handheld
- Physical Description
- plastic (overall material)
- paper (sticker material)
- rubber (feet material)
- metal (circuits material)
- Measurements
- overall: 1 in x 3 in x 5 3/4 in; 2.54 cm x 7.62 cm x 14.605 cm
- place made
- Japan
- See more items in
- Medicine and Science: Computers
- Computers & Business Machines
- Handheld Electronic Calculators
- National Museum of American History
- Record ID
- nmah_334582
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746ae-0cce-704b-e053-15f76fa0b4fa
