VINTAGE CASIO Casiotron 29CS-11 World time Digital Watch WORK | eBay
Casiotron 1974 - The First Casio Digital Watch I Know Watches
Casiotron 25CR-16. The date only goes up to 2009. So it's stuck in the 1970s forever. : r/casio
Casiotron S14 1XS – My Retro Watches
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,