Casio Calculator Watches Are Pre-Apple 1980s Icons Still On Sale Today - Bloomberg
UPDATE: today I had a new battery and wrist band installed in the Casio TC- 50 that I bought in the 1980s. It is fully functional, including the touch screen calculator. So cool !
Casio TC-50 - Album on Imgur
VTG 80S CASIO TC-50 Touch Screen Calculator DIGITAL WATCH From Japan AS-IS Read $40.00 - PicClick
Vintage Casio digital watch TC-50 Touch Screen Calculator for spares repairs