Rooted in Seiko’s pioneering spirit, the Prospex Diver SPB545J1 reflects a legacy that began in 1965 with Japan’s first diver’s watch and is limited to just 4000 pieces. Crafted with purpose, its 40mm stainless steel case feels reassuringly solid, enhanced by a super-hard coating that adds a smooth yet resilient finish. The tranquil teal dial draws the eye with its ocean-inspired depth, while LumiBrite filled hands and markers glow clearly, offering confidence in low-light conditions. A unidirectional rotating bezel clicks with satisfying precision, reinforcing its practical diving credentials. The clasp can also be adjusted in six steps with each measuring around 2.5mm, allowing a total range of approximately 15mm.

Powered by the in-house 6R55 automatic movement, the SPB545J1 delivers a generous 72-hour power reserve and dependable everyday performance. Designed for professional specifications, it is water resistant to 300 metres and built to withstand demanding environments. This model suits those who appreciate purposeful engineering paired with refined detail, whether worn for serious water sports or as a robust daily companion. As part of the Prospex Save the Ocean collection, it also carries a subtle connection to marine conservation, aligning thoughtful craftsmanship with a respect for the sea.

• Powered by the 6R55 automatic movement with 24 jewels and a power reserve of up to 72 hours.
• Presented on a silver stainless steel bracelet with push button deployment clasp.
• Curved scratch resistant sapphire crystal glass with an anti-reflecitive coating inside.
• 40.0mm case width.
• 300 metre water resistance.