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Texas Instruments T-1220 distributed by True Value

Date of introduction:  1976 Display technology:  LED-stick
New price:  $9.95 Display size:  8
Size:  5.5" x 2.8" x 1.4"
 138 x 70 x 35 mm3
   
Weight:  3.9 ounces, 110 grams Serial No:  5060
Batteries:  9V  Date of manufacture:  wk 23 year 1976
AC-Adapter:  AC9180 Origin of manufacture:  USA
Precision:  8 Integrated circuits:  TMS0972
Memories:      
Program steps:   Courtesy of:  Joerg Woerner

Nothing else than a TI-1200 with another keyplate sold under the name of True Value. Don't miss the T-1225 based on the TI-1250.

Maybe there is a story behind this calculator ? One source (1) tells that this calculator was planned as a regular TI calculator. Shortly after approval of the calculator by the QRA the project was stopped.

T-1220_BOX.jpg (24006 Byte)The box of the T-1220 states: Custom model manufactured for True Value Hardware Stores

The warranty address on the back of the calculator is: Texas Instruments Service Facility.

T-1220_1.jpg (42181 Byte)Later T-1220 models removed this text.

Don't miss the rare Texas Instruments 1265 manufactured for Koh-I-Noor Hardtmuth.

(1) The National Museum of American History's Chip Collection
     Commets by Bill Heye, Ralph McCullough



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If you have additions to the above article please email: joerg@datamath.org.

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