CASIOTRON and G-Shock: CASIO founders - Kashio four brothers and the first CASIOTRON
02-503 CASIO Casiotron 1974 Digital LCD Quartz watch uhr MOT のeBay公認海外通販|セカイモン
Vintage Casio Casiotron 04-504 Digital Men's Wristwatch | WatchCharts
The Casio Vintage Club | Casio Casiotron 01-501(01), release date 1974 November, this is the debut model, the beginning of Casio wrist watches, the very first model
Buy Vintage Casio Casiotron S-14 X-1S Watch Mens Digital LCD World Online in India - Etsy
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
Early Casios (Casiotron) | Wrist Sushi - A Japanese Watch Forum
Casiotron X-1 Watches Original Advert 1977 (ref AD6945) – The Nostalgia Shop