Texas Instruments

• Basic

Model: TI-2550 III
Battery: BP3
Adapter: AC9130A
Year: 1976
Chip: TMS1043
Info:

• Basic

Model: TI-2550 IV
Battery: BP4
Adapter: AC9900/H
Year: 1979
Chip: TMC1981,TMC0999
Info:

• LCD-1982-1987

Model: TI-2600 personal banker
Battery: solar
Adapter: 
Year: 1987
Chip: Toshiba     
Info:

• Majestic line
• TMC0981
• TI-30

Model: TI-30 LED
Battery: 9 volt or RK2
Adapter: AC9132 or AC9182
Year: 1976 Price: Lire 19.000 + 14 % iva
Chip: TMC0981          
Info:This Italian-made TI-30 (4376 RCI, November 1976) looks different from the original TI-30. Instead of the usually printed TI logo and the TEXAS INSTRUMENTS nameplate, this one uses only a sticker, a metal plate with a black background and gold-colored writing, like other calculators made in Europe, TI-45, TI-57, Privileg SR-35NC, but also a calculator sold by Radio Shack in the United States, the Radio Shack EC-4000. Later, during production, the metal plate was replaced to adapt it to the US design. We are particularly fond of this one, as we have been looking for one for many years and finally found two in one week (2023).

Here's a nice display for the famous TI-30 LED. They could have inserted a small wafer into this PCB and then covered it with resin or soldered the integrated circuit, the TMC0981.

• LCD-1985-1990
• Rare
• Prototype
• TI-30

Model: TI-30 clear case
Battery:  2  x LR44
Adapter: no
Year: 1986
Chip: TP0456/CD4565   
Info:In particular, the writing is in orange, as are the keys and the battery cover of the same color, made in Italy (Rieti).

I have to thank Gaetano Perrella, former employee of Texas Instruments in Rieti for the donation! 

Why were transparent shells made? Transparent shells helped visually where the CAD of the time was not enough, in this way further mechanical modifications could be made!  (info Domenico Calì , former Texas Instruments employee).The transparent shells helped visually where the CAD of the time was not sufficient, in this way further mechanical modifications could be made! info Domenico Calì (ex Texas Instruments employee)

Another particular reason for the transparent case was to follow the behavior of the flexible PCB combined with the rubber keyboard, elements introduced for the first time at TI by us in Rieti. Info Gaetano Perrella (ex Texas Instruments employee)