Unitrex 95SL Handheld Electronic Calculator

Description
This handheld electronic calculator has a tan plastic case and an array of twenty-four rectangular indented plastic keys. These include ten digit keys, a decimal point key (that can also serve as a memory exchange key), a percentage key, a total key, four arithmetic function keys (one of which can also serve as a squaring key and another as an inverse key), a square root key, four memory keys, a clear entry/clear key, and a function/clear function key.
Behind the keys is an eight-digit red LED display. A worn mark above it once read: UNITREX. The on/off key is on the right side and the power jack is on the left side.
A sticker on the inside of the battery compartment on the back reads: 9 VOLT BATTERY. The compartment cover is missing. Text at the bottom of the case reads: HONG KONG.
The model number is deduced by comparing this object to objects on websites and in printed sources.
References:
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 171.
[Advertisement], Progress Bulletin [Pomona, California], March 28, 1977, p. 26. Calculator selling for $7.99.
Vintagecalculators.com website.
Location
Currently not on view
Object Name
electronic calculator
date made
ca 1977
maker
Eiko Business Machine Company
Physical Description
plastic (case; keys material)
metal (circuitry material)
paper (sticker material)
Measurements
overall: 7/8 in x 2 1/2 in x 5 1/8 in; 2.2225 cm x 6.35 cm x 13.0175 cm
place made
Zhonghua: Hong Kong
ID Number
1986.0988.016
catalog number
1986.0988.016
accession number
1986.0988
subject
Computers & Business Machines
Handheld Electronic Calculators
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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