Seiko General x Analog ft. Conceptual Couple Formal Round 100m Water Resistant Watch SUR636 SUR312 SURDiscover the perfect pair with Seiko matched timepieces. The men SUR312P1 and ladies SUR636P1 share a two-tone stainless steel design, elegant silver-toned dials, and sapphire crystal. Both offer 100m water resistance and precise quartz movement for a harmonious blend of style and performance.Caliber Number / Movement6N52 / 6N22 (quartz)Battery Life / AccuracyApproximately 3 years (+/-15 seconds per month)CrystalSapphire crystalLuminousLumiBrite on hands and indexesCase / Band MaterialStainless steel case with stainless steel band (three-fold clasp with push-button release)Water Resistance100m / 10 barCase SizeThickness: 8.4 / 8.2 mmDiameter: 40.2 / 29.8 mmLength: 47.0 / 37.0 mmLug width: 20.0 / 14.0 mmOther SpecificationsSeiko General x Analog ft. ConceptualScrew case backDate displayRegular timekeeping (analog display)