Unisonic 1541L Handheld Electronic Calculator

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This handheld electronic calculator has a metal and black plastic case and an array of thirty rectangular plastic keys. These include ten digit keys, a decimal point key, a total key, four arithmetic function keys, and four memory keys. In addition the instrument has clear, clear entry, percentage, CS, and CA keys. Behind the keyboard is an eight-digit red LED display. A mark at the back reads: Unisonic 1541L. The on/off switch is on the right edge.
A jack for a power adapter is along the back edge. At the top of the back is a compartment for a nine-volt battery. A sticker below it reads: SERIAL NO. (/) 031491 (/) Made in Hong Kong.
According to the Vintage Calculators website, this model calculator also sold as the Prinztronic 400, the dsc CAL-0041, the Meir 880, the RJP 880, and the Texet 880 Executive.
Calcuseum website gives date of 1978.
[Advertisement], , August 7, 1979, p. 41. Advertises calculator.
Website vintagecalculators.com lists related models.
Currently not on view
date made
ca 1979
place made
Zhonghua: Hong Kong
Physical Description
plastic (case; keys material)
metal (case; circuitry material)
paper (sticker material)
glass (display material)
overall: 7/8 in x 2 3/4 in x 5 1/4 in; 2.2225 cm x 6.985 cm x 13.335 cm
ID Number
catalog number
accession number
Credit Line
Gift of John B. Priser
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History


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