DATAMATH CALCULATOR MUSEUM
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|
|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.
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.
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
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, December 5, 2001. No reprints without written permission.