Casio CA-53WF : Réédition d'une montre culte ! Avis / Test
So I have this C80… but on fresh batteries, I can't seem to get any button to work, except the light. All others are unresponsive. I tried poking directly at the module
Casio C-80 Wrist Watch for Men for sale online | eBay
VINTAGE WATCH CASIO Calculatrice C80 EUR 175,00 - PicClick IT