Early Seiko dive watches might not be the bargain they once ... at the 4 o’clock position. The in-house automatic 17 jewel 21,600 bph cal. 6105A powers the watch; some were hacking, others were not, ...

The new Speedtimers are powered by the Seiko Caliber 8R48, a 34-jewel automatic chronograph movement with a column wheel, a vertical clutch and 45 hours of power reserve. Its three sub-dials track ...