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
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 glass seal required | WatchUSeek Watch Forums
Casio TC-600] Seemingly the only digital watch on campus that isn't an Apple Watch http://ift.tt/2ze85Ic | Casio, Watches, Digital watch