The SPB513 belongs to the Seiko “Prospex Speedtimer” line — a family that draws inspiration from Seiko’s motorsport and timing heritage. Rather than being a traditional chronograph, SPB513 reinterprets the “sports timing” spirit through simpler means: combining a streamlined automatic watch with practical timing tools. With SPB513, Seiko offers a modern mechanical watch that nods to vintage design and practicality, blending everyday wearability with subtle sporty functionality.