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TI 1776Model: 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%.