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Texas Instruments Studio 29 (gold) distributed by Koh-I-Noor Hardtmuth

Date of introduction:  1977 Display technology:  LED-stick
New price:   Display size:  8 (5 + 2)
Size:  5.8" x 3.1" x 1.4"
 148 x 78 x 36 mm3		    
Weight:  4.0 ounces, 114 grams Serial No:  696129
Batteries:  9V or RK2 Date of manufacture:  wk 48 year 1977
AC-Adapter:  AC9900/R Origin of manufacture:  Italy (RCI)
Precision:  10 Integrated circuits:  TMS0981
Logic:  AOS - 4 Pending Operations, 15 ()    
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Texas Instruments Studio 29? We were really surprised to locate in December 2015 this unusual looking calculator on the Italian eBay site. At first glance the Studio 29 - manufactured for Koh-I-Noor Hardtmuth - looks like a hybrid of two different products:

• The basic functionality is borrowed from the TI-15 introduced in 1976
• The yellow-brown keyboard plate is... unique

Looking closer at the Studio 29 reveals a strange difference to the TI-15 sold in Europe - the [K]-key is missing!

Dismantling this Studio 29 manufactured in November 1977 reveals a standard TI-30 printed circuit board (PCB) with the well-known TMS0981 single-chip calculator circuit.

Don't miss later Studio 29 with its silver keyboard plate, the model 45, model 40, and it's successor professional.

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

© Joerg Woerner, December 29, 2015. No reprints without written permission.