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 : r/casiovintage
Casio TC-600 Calculator Alarm Chronograph LCD Watch Original Bracelet #119 MINT | eBay
VTG Casio Touch Sensor Calculator Watch Men Silver Tone TC-600 New Battery | eBay