Casiotron 25CR-16. The date only goes up to 2009. So it's stuck in the 1970s forever. : r/casio
Prodajem RETRO sat Casio Casiotron
Casiotron 46CS-27 – 20th Century Watches
CASIO CASIOTRON 31-CS-10 JAPAN YEAR 1975 | eBay
Vintage Casio CASIOTRON 02-504, QW.02 Japan Liquid Crystal, Year 1976 | eBay
Vintage Casio collection and Casiotron series and model numbering | WatchUSeek Watch Forums
This Casiotron S-15 is released way back in the 1976 when Casio first released their lineup of digital watches! Such a joy everytime I wear this watch! : r/casio
X - Casio Casiotron TRN-03 WR Digital Vintage - G-Shock Vintage
CASIOTRON X-1 (1977) : r/casio
Coolest Vintage - Non-traditional Casiotron dress watch. Inside the gold plated case, a well concealed Casio stamped dark grey module confirming the whole thing was produced in-house. Can't find any info online,