Texas Instruments SR-51A Version 2

Date of introduction:  1975 Display technology:  LED-stick
New price:  $224.95 Display size:  10 + 2
Size:  5.8" x 3.2" x 1.3"
 147 x 81 x 32 mm3
Weight:  8.5 ounces, 240 grams Serial No:  9250349
Batteries:  BP1A Date of manufacture:  wk 12 year 1976
AC-Adapter:  AC9130, AC9130A Origin of manufacture:  Netherlands
Precision:  13 Integrated circuits:  TMC0501, TMS0522, TMC0523
Memories:  3    
Program steps:   Courtesy of:  Joerg Woerner

We are not sure if the additional markings of the conversions and constants on this SR-51A are homemade or done by Texas Instruments. The calculator itself shows no differences to the known SR-51A.

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If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.