Seiko Prospex SPEEDTIMER

The Seiko Prospex SPEEDTIMER, reference SFJ007, is a chronograph with a 42 mm steel case. This is a limited edition of 4000 pieces. The case measures 12.9 mm thick, with a water-resistance rating of 100 metres. Solar-powered calibre 8A50 operates for approximately 6 months when fully charged. Over the dial is a curved sapphire crystal with an anti-reflective coating on the inner surface. The dial has LumiBrite on the hands and indices; movement accuracy is plus or minus 15 seconds per month. The lug width measures 20 mm; elapsed time is measured in increments of 1/100 second. A three-fold clasp with push-button release fastens the watch.