The SPB121 represents a contemporary interpretation of Seiko's pioneering 1959 sport watch, refined from an acclaimed 2019 limited release. Built for adventurers who demand both performance and refinement, this Prospex timepiece combines functional innovation with sophisticated aesthetics. The rotating inner compass bezel supports outdoor navigation, while the sunray green dial with gold detailing and LumiBrite luminous hands ensures visibility in any condition. A magnified date window and sapphire crystal with inner anti-reflective coating enhance legibility and durability. Powered by a 24-jewel automatic movement calibrated at 21,600 vibrations per hour, it delivers approximately 70 hours of power reserve and accepts both manual and automatic winding. The stainless steel case pairs with a brown leather strap secured by a tri-fold push button clasp, complemented by a screwdown crown and exhibition caseback. Rated 20 bar water resistant to 200 meters. Case 39.5mm
