The very first one
The first of the series, released in October, 1982 in Japan.
RAM : 1568 / 1568 steps with OR-1 module.
Twice as cheaper as the SHARP PC-1211, it was a huge commecial success thanks to a very active marketing program.
A customized machine by Hobbiecat
30 games for Casio - italian book : 30 giochi per il Casio
The japanese Video on youtube
In french press (1983):
New scientist ad (sept. 8th 1983)
New scientist ad (Jan 13th 1983)
Ad in spanish :