Texas Instruments SR-52 Handheld Electronic Calculator

This handheld programmable scientific electronic calculator has a black plastic case and forty-five small rectangular plastic keys arranged in nine rows. In addition to ten digit keys, a decimal point key, and a change sign key (all light gray), the calculator has a total key, four arithmetic function keys, a clear key, a clear entry key, and a "2nd" key (all gold). The remaining keys are brown. Pushing the “2nd” key allows the keys to serve a “dual function,” which is given in text above the keys.
The space for programming cards is just above the keyboard. A mark behind this reads: TEXAS INSTRUMENTS SR-52. Behind it are an R/D (radians/degrees) switch and an on/off switch. Behind this is an LED display that shows ten positive or negative digits of the result as well as powers of ten from -99 to +99.
The power supply plugs into the calculator along the back edge. A mark on it reads: MODEL AC 9130A.
A sticker on the back of the calculator reads in part: TEXAS INSTRUMENTS (/) SR-52 (/) Serial No. (/) SR-52 011415. It also reads in part: ASSEMBLED IN USA. Below the sticker is a compartment that holds three batteries. A sticker for it reads in part: TEXAS INSTRUMENTS BATTERY PACK BP-1. Removing the battery pack reveals two chips. The larger has text that reads: TMC0501NL (/) EΔ7537. The small one has the mark: TMC 0595 NL (/) BA7539. A mark on the back of the calculator near the bottom reads: 4675DTA.
Also included with the object is a black plastic folder that holds twenty-six magnetic cards with programs on them, a tablet of preprinted forms for writing programs, and two small spiral-bound notebooks of documentation. One is the Owner's Manual, the other is the Operating Guide. These documents are copyrighted 1975.
Compare 1987.0435.01 and 1987.0487.297.
Ball & Flamm give a 1976 price of $229.
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 154.
Currently not on view
Object Name
electronic calculator
date made
Texas Instruments
Physical Description
plastic (case; keys; power supply case; program case material)
metal (circuitry; screws material)
paper (manuals; box; program sheets material)
calculator: 4.5 cm x 8 cm x 26 cm; 1 25/32 in x 3 5/32 in x 10 1/4 in
overall: 7 cm x 21.5 cm x 28 cm; 2 3/4 in x 8 15/32 in x 11 1/32 in
ID Number
nonaccession number
catalog number
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 Uta C. Merzbach
Additional Media

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