1985 Casio TC-600 | Long before smart watches, there were calculator watches. 1985 Casio TC-600 with touch sensor display... there's just something so cool about these!... | By Plethora Businesses | Facebook
Casio TC-600 Touch Sensor Calculator Vintage Men's Watch For Parts | eBay
A 1986 Casio TC-600 Touch Screen Calculator. This watch has a dual-layer LCD with one layer for calculator buttons, and the other for digits. - 9GAG