Seiko Prospex challenges every limit, with a collection of timepieces for sports lovers and adventure seekers whether in the water, in the sky or on land. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative technology has changed global standards. We are constantly striving to bring ever greater reliability and safety to both professional and recreational divers. MOVEMENT CALIBER 6R35 MOVEMENT TYPE: Automatic with manual winding PRECISION: +25 to -15 seconds per day POWER RESERVE: Approx. 70 hours FUNCTIONS: Stop second hand function Date display CASE/BAND CASE MATERIAL: Stainless steel (hard coating) CASE SIZE: -Thickness: 13.2mm-Diameter: 39.5mm-Lug-to-lug: 46.4mm Crystal: Sapphire crystal with magnifier Crystal Coating: Anti-reflective coating on inner surface LumiBrite: Lumibrite on hands and index(es) Band Material: Calfskin Clasp: Three-fold clasp with push button release Distance Between lugs: 20mm OTHER DETAILS Water Resistance: 20 bar Weight: 87.0g Features: Rotating compass inner ring Screw-down crown See-through & Screw case back REF: SPB121J1