The Seiko Prospex SPB515J1 is a sleek and compact chronograph from the Speedtimer series, designed for precision and durability. It features a 39.5mm stainless steel case with a super-hard coating, a curved sapphire crystal with anti-reflective coating, and a screw-down case back. Powered by the automatic Caliber 6R55, it offers a 72-hour power reserve and a stop-second function for accurate time setting. With 20 bar water resistance and a three-fold clasp with push-button release, itβs built for both performance and comfort