APF Mark 61 Handheld Electronic Calculator

This compact handheld electronic calculator has eleven white plastic keys, ten for digits and one for a decimal point. It also has four gray plastic memory keys and eight tan plastic keys. The tan keys are for arithmetic operations, square root, percentage, clear entry/clear, and equals. The display is behind the keys. A mark above it reads: aPF EXECUTIVE. Battery sealed. A hole for the adapter and recharger is on the back edge.
A metal tag on the back reads: aPF EXECUTIVE (/) MODEL NO.:MARK 61 (/) D.C. 2.4 VOLTS (/) CAUTION: USE ONLY (/) A.C. ADAPTOR (/) RECHARGER MODEL 751S to OPERATE (/) ON A.C. Another mark there reads: SERIAL NO:A012559 (/) APF ELCETRONICS INC. (/) NEW YORK, N.Y. 10022 (/) MADE IN JAPAN.
No advertisements have been found for this calculator. Ball and Flamm say that the calculator has a fluorescent display and cost $19.85 in 1977.
Guy Ball and Bruce Flamm, The Complete Collector"s Guide to Pocket Calculators, Tustin CA: Wilson/Barnett,1997, p. 30.
Currently not on view
Object Name
electronic calculator
date made
ca 1977
APF Electronics
Physical Description
plastic (overall material)
aluminum (overall material)
overall: 1/2 in x 2 3/4 in x 5 1/2 in; 1.27 cm x 6.985 cm x 13.97 cm
place made
ID Number
catalog number
accession number
Handheld Electronic Calculators
Computers & Business Machines
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of John B. Priser
Additional Media

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