Casio F-10/11/12 and a NOS F-23W! I've acquired these on my journey to collect retro/vintage Casio's. They are slowly creeping up in cost and more so in unused condition. : r/casio
OROLOGIO DIGITALE VINTAGE CASIO 50m Chrono Sonar 3274 AL 190W EUR 290,89 - PicClick IT