Seiko Presage Watches Mod. Ssa421j1 Official Box Product Description:The Seiko Presage SSA421J1 is a distinguished men's automatic watch that seamlessly blends traditional Japanese aesthetics with modern craftsmanship. Its open-heart design offers a glimpse into the intricate mechanics, embodying Seiko's commitment to precision and elegance. Key Features: Movement: Seiko Caliber 4R39 automatic movement with manual winding capability.Power Reserve: Approximately 41 hours.Jewels: 24.Case Material: Stainless steel.Case Dimensions: Diameter 41.8mm; Thickness 12.5mm; Lug-to-lug 48.4mm.Crystal: Dual-curved sapphire crystal for enhanced durability.Dial: Blue dial with an open-heart window, showcasing the watch's inner workings; rose gold-tone Roman numeral hour markers and hands.24-Hour Subdial: Positioned at 10 o'clock.Strap: Blue calfskin leather strap with a three-fold clasp and push-button release.Water Resistance: Splash resistant.Case Back: See-through screw case back, allowing a view of the movement.Additional Features: Stop second-hand function for precise time setting. This timepiece reflects Seiko's dedication to quality and design, making it a perfect choice for those seeking both functionality and timeless elegance. SpecificationValuePackagingOfficial Box