Seiko Presage x Automatic ft. Classic Series aka Open Heart aka Shiro-Iro Men Formal Round 100m Water Resistant Watch SPB469J1 SPB469 SPB-469 SPB-469J1 Discover the Seiko Presage Classic open-heart watches, boasting dials with a unique radial pattern reminiscent of raw silk yarn and deeply recessed sub-dials. Powered by the calibre 6R5J with 72 hours of power reserve, these timepieces feature a comfortable, 1970s-inspired multi-row bracelet with a deployant clasp and push-button release mechanism, perfect for those seeking style and comfort. Caliber Number / Movement 6R5J (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 72 hours (+25 to -15 seconds per day) Crystal Sapphire crystal (dual-curved, anti-reflective coating) Luminous Nil Case / Band Material Stainless steel (super hard coating) case with stainless steel band (deployment clasp with push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 13.0 mm Diameter: 40.2 mm Length: 46.0 mm Lug width: 20.0 mm Other Specifications Seiko Presage x Automatic ft. Classic Series aka Open Heart aka Shiro-Iro Made in Japan Magnetic resistance (4,800 A/m) See-through case back Screw case back 24 jewels 24-hour display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)