Seiko Marinemaster 300m SBDX017 “Box and Papers” Seiko Marinemaster reference SBDX017 Prospex. Discontinued model with Marinemaster legend on the dial. Watertight at 300 meters, monobloc case, 8L35 automatic movement. Steel bracelet with folding clasp. Unused original Seiko rubber strap. Year 2018. Complete with boxes and documentation. With one year warranty.