Object Details
- Description
- This handheld electronic calculator has an array of ten white digit keys and five black keys for the four arithmetic operations and percentage. Red keys are for a decimal point, EX, clear entry/clear, equals, four memory functions, and D (display). A vacuum fluorescent display for eight digits and a decimal point is behind the keys. A battery compartment is at the top.
- A mark above the keyboard reads: aPF MARK 25/MEMORY. A silver-colored paper tag on the back gives operating instructions. Toward the bottom of this tag it reads: APF ELECTRONICS INC (/) MODEL MARK 25 (/) SERIAL # K55342 (/) THIS CALCULATOR TO BE USED ONLY WITH APF LISTED A.C. ADAPTER MODEL 710 OR MODEL 716 (/) MADE IN U.S.A. A mark inside the lid of the battery case reads: JAPAN (/) K-140032.
- A February 1975 advertisement in the Los Angeles Times indicates that the APF Mark 25 sold for $24.95 with an additional $4.95 for the power adapter. A November 1975 advertisement in the New York Times indicates that the APF Mark 25 pocket calculator (with eight-digit display) regularly sold for $19.95 and could be purchased for $17.95, with a few dollars more for the power adapter. A February 1976 advertisement in the Los Angeles Times indicates that the APF Mark 25 sold on clearance for $19.99.
- References:
- Los Angeles Times, February 28, 1975, P. A26.
- New York Times, November 2, 1975, p. 46.
- Los Angeles Times, February 27, 1976, p. B9.
- Location
- Currently not on view
- Data Source
- National Museum of American History
- maker
- APF Electronics
- date made
- ca 1975
- Credit Line
- Gift of John B. Priser
- Physical Description
- plastic (overall material)
- paper (tag material)
- rubber (feet material)
- Measurements
- overall: 1 in x 2 7/8 in x 5 3/4 in; 2.54 cm x 7.3025 cm x 14.605 cm
- Object Name
- electronic calculator
- Other Terms
- electronic calculator; Handheld
