Casio CFX-400 Scientific Calculator Watch Module 463 - NEW OLD STOCK - RARE FIND | WatchCharts
Casio CFX-400 scientific calculator vintage digital watch chronograph with alarm | #1775176817
File:Cost of Casio dbc-600 and cfx-400 watches during 1986.png - Wikimedia Commons
Saturday watch here, Casio made some great lines of timepieces, but the calculator watches are probably the most recognized, this one is the Casio CFX-400! Capable of normal timekeeping, it was a