Model: TI-1755 Battery: Adapter: Year: 1982 Chip: Sharp LI3033MT Info: In the year 1982 Texas Instruments introduced not only cheap looking calculators manufactured in Taiwan like the TI-1015 or TI-1006 but some very stylish and thin calculators.
Model: TI-1757 Battery: 2 x LR54 Adapter: Year: 1981 Chip: Sharp LI3033MT Info: The TI-1757 added the ability to reproduce musical notes to the TI-1755, pressing all keys from zero to nine reproduces the musical scale.