Seiko Presage x Automatic ft. Classic Series aka Open Heart aka Shiro-Iro Men Formal Round 100m Water Resistant Watch SPB480J1 SPB480 SPB-480 SPB-480J1 Introducing the latest Presage Classic model from Seiko, inspired by the silk heritage of Japan. Featuring off-white dials that evoke silk softness and elegant gold accents under dual-curve sapphire glass, this model showcases an open-heart design that combines vintage charm with modern functionality. Its retro-inspired bracelet offers comfort and style, while the reliable 6R55 movement provides a date function and a 72-hour power reserve. 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)