Vtg Texas Instruments 1974 Slide Rule Electronic Calculator SR-50 w/LED Display

  • $199.97

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Vintage Texas Instruments (TI) 1974 Slide Rule Electronic Calculator SR-50 w/LED Display & NEW Battery Pack - One of the First Affordable Scientific Calculators Ever! 


Own a piece of computing history with this Vintage Texas Instruments SR-50 Slide Rule Electronic Calculator from 1974. This calculator is a testament to TI's engineering prowess of the time. Perfect for collectors or enthusiasts, it combines nostalgia with functionality. The SR-50 was renowned for its reliability and accuracy, making it a sought-after piece for vintage tech aficionados. Don't miss out on this opportunity to own a piece of computing heritage.


Key Specifications:

  • Slide rule calculator
  • 10-digit display + 2 digit exponent
  • 1 data memory
  • 4 functions: add, subtract, multiply, and divide
  • 3 slide rules: logarithm, trigonometric, and exponential
  • Runs on 1 recharageable battery pack (replaced with new battery pack on March 1, 2024), Original non-functioning battery pack also included for completeness.

Comes with everything pictured:

  • TI SR-50 Calculator
  • New battery pack (just purchased on 3-1-24 for $47.15)
  • Original battery pack (no longer working)
  • Original AC Adapter
  • Original purchase receipt from 1974
  • Original Manual
  • Original TI list of customer service facilities and TI's original instructions on charging the battery pack before first use
  • Instructions on how to maintain the new battery pack.

Approx. Dimensions: 5-7/8" L x 3-1/4 W x 1-1/2" Thick at the display top edge

Approx. Weight: 9.2 ozs


Sold as is. No warranty from the seller. No Returns.


CONDITION NOTE: Used but in excellent working condition, given its age and the addition of a brand new battery pack on 3-1-24 (note that the new battery pack fits tight and needs to be pressed firm to get it into place). This particular calculator has been meticulously preserved and shows minimal signs of wear, making it a true collector's item. The device has been tested and appears fully functional. Three of the four rubber feet were missing, so added brown felt feet to make the calculator stable for pressing keys. Will be packed carefully and insured for shipping. See all detailed pictures to know what you are purchasing.


Background on Texas Instruments:

Texas Instruments (TI) was founded in 1930 as Geophysical Service Incorporated, a company providing seismic exploration services to the oil industry. In the 1950s, TI began manufacturing semiconductor devices and by the 1960s had become a pioneer in developing integrated circuits.

The company entered the consumer electronics market in 1972 with the TI Datamath calculator, one of the first handheld electronic calculators. TI continued to lead the handheld calculator market in the 1970s and 1980s with innovative products including scientific and graphing calculators. Today, TI is a global semiconductor company specializing in analog and embedded processing chips.


Release Date: January 1974 (this actual unit was purchased in Nov 1974

Age of Item: 50 years old


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NOTE: If you would like to see what other Antiques and Collectibles I currently have listed, please check out my eBay Store page: https://www.ebay.com/str/quantumonlinesalesservices/Antiques-Collectibles/_i.html?store_cat=34571408011