A tribute to Seiko’s 1969 breakthrough, this Speedtimer features a 42mm case, tachymeter bezel, and highly legible sub-dials beneath dual-curved sapphire glass. Powered by the in-house 8R48 calibre with vertical clutch, column wheel, and 3-pointed hammer, it offers precise, durable chronograph performance, true to the Prospex spirit of professional-grade reliability. • Powered by the automatic movement with 34 jewels and a power reserve of up to 45 hours. • Presented on a silver stainless steel bracelet with push button deployment clasp. • Scratch resistant sapphire crystal glass. • 42mm case width. • 100 metre water resistance.