APF Mark 85 Handheld Electronic Calculator

Description
This handheld electronic calculator has an array of ten white digit keys and an eleventh white deimal pont key. It has keys for the four arithmetic functions, percentage, clear entry/clear, and equals. Five orange memory keys are in the rightmost column. The on/off switch is above these keys on the left, and the nine-digit fluorescent display is behind this. A mark below the display reads: aPF MARK 85. The hole for the adapter is on the top edge.
The black plastic case has two rubber feet at the top. A silver-colored paper sticker below this reads: aPF ELECTRONICS, INC. (/) MODEL NO. MARK 85 (/) D.C. 4.5 VOLTS (/) CAUTION: Use only A.C. adaptor (/) model 751S to operate on A.C. (/) SERIAL NO: 053059 (/) S85 MADE IN JAPAN. Below this is the cover for the battery case that holds three AAA bateries. A mark on the inside of the lid of this case reads: JAPAN (/) 0108641.
This calculator closely resembles the APF Mark 65r, although the function keys are slightly different (no square root key on the 85) and there is no rechargeable battery. Compare 1986.0988.174.
No advertisements found for this calculator. Assigned date on basis of similarity with APF Mark 65r.
Location
Currently not on view
Object Name
electronic calculator
date made
ca 1977
maker
APF Electronics
Physical Description
plastic (case; keys; screen material)
metal (electrical connector material)
paper (sticker material)
rubber (feet material)
Measurements
overall: 1 in x 2 7/8 in x 4 7/8 in; 2.54 cm x 7.3025 cm x 12.3825 cm
place made
Japan
ID Number
1986.0988.176
accession number
1986.0988
catalog number
1986.0988.176
subject
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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