This is the Casio masterpiece diver's watch, the "Kajiki Diver" MD-723. This rare vintage model features a marlin mark engraved on the back cover and is a hard-to-find collector's item. ・Model Number: MD-723 ・Back Cover Engraving: Marlin 341929 ・Working (as of the time of listing in 2025) ・Belt: Genuine-style urethane (missing the belt loop) ・There are minor scratches on the case and crystal, but it is in good condition considering its age. ・Luminous paint and rotating bezel operation have been confirmed. ※This is a vintage item and will be sold as-is. ※For those who appreciate its value and for collectors.