This is a CASIO diver's watch, model MD-500. It has a design typical of vintage Japanese divers and is a popular model for collectors. ✨Key Features ・Rotating bezel functions properly ・No noticeable scratches on the crystal, exterior is clean ・Case and back cover are in good condition for their age ⚠️Current Condition ・Battery replaced, but it is not running and is non-functional, so it is considered junk Suitable for collectors, parts, or as a restoration base.