Texas Instruments

• Basic
• Rare

Model: TI-1270 V0
Battery: 9 volt
Adapter: AC9180
Year: 1977
Chip: TMS0974 (7701) Year 77 Week 01 / ZA0355
Info: Discovery of a very early version of TI-1270 built in Rieti (RCI2177 Week 21 Year 1977), you can see the writing 1270 printed on the metal mask under the display.

• Basic
• TMS0972NL

Model: TI-1400
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMS0972
Info: 

• Basic
• TMS0972NL

Model: TI-1450
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMS0972
Info: 

Model: TI-15 explorer lcd
Battery: CR2025
Adapter: 
Year: 2007
Chip: China
Info:

• Euro line

Model: TI-15 lcd
Battery: 2 x AA alkaline
Adapter: 
Year: 1982
Chip: Taiwan
Info