Casio] Hump Day Digital. My TC-600 from 1986 and my first purchased watch : r/Watches
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
Vintage Casio TC-600 Touch Sensor Calculator Watch For parts or repair | eBay