Texas Instruments

• LCD-1985-1990

Model: TI-1768 II
Battery: solar
Adapter: 
Year: 1991
Chip:  Sharp LI3135 or LI3154    
Info:

• LCD-1985-1990

Model: TI-1768
Battery: solar
Adapter: 
Year: 1987
Chip:  LI3135 sharp    
Info: LCD  1985 - 1990 

• LCD-1985-1990

Model: TI-1775
Battery: solar
Adapter: 
Year: 1988
Chip: 
Info: 

• LCD-1985-1990

Model: TI-1775+
Battery:  LR44
Adapter: 
Year: 1997
Chip:
Info: made in Thailandia 

• LCD-1985-1990

Model: TI-1776
Battery:  Solar
Adapter: 
Year: 1982
Chip:
Info:At first glance seems the TI-1776 almost identical with the TI-1766, the first solar powered calculator introduced by Texas Instruments. The main difference is a much smaller and thinner housing, engineers of Toshiba, Japan shrank the calculator in all three dimensions by about 20%.