The Prospex SPB301J! watch it has a white dial set in a case with the characteristic classic shape of the 1970 model, which proved its strength and resistance when worn by the Japanese adventurer Naomi Uemura. The watch is powered by the 6R35 caliber movement and offers a 70-hour power reserve. Waterproof up to 200 meters, it mounts a steel bracelet. Its case features an ultra-resistant coating and a sapphire crystal with an anti-reflective coating on the inner surface to ensure great readability from all angles. The twelve indexes are generously coated with Lumibrite, as are the hands, to maximize readability in the dark. This creation joins the Seiko Prospex Save the Ocean collection.

Movement
- Accuracy: -15/+25 seconds per day
- Calibre: 6R35
- Movement Type: Automatic & Manual Winding
- Power Reserve: 70 Hours

Watch Case
- Case Material: Stainless steel (Super Hard Coating)
- Case Thickness: 13.15mm
- Case Diameter: 42.65mm
- Case Length: 46.35mm

Exterior
- Dial Colour: White
- LumiBrite: Lumibrite on hands, indexes and bezel
- Clasp: Three-fold clasp with secure lock, push button release with extender
- Strap/Bracelet: Stainless Steel

Other Specifications
- Water Resistance: 20 bar
- Crystal Coating: Anti-reflective coating on inner surface
- Crystal Type: Curved Sapphire Crystal