Seiko Prospex SPEEDTIMER

The Seiko Prospex SPEEDTIMER, reference SRQ039J1, is a chronograph with a 42.5 mm steel case. The case is 15.1 mm thick, with a lug-to-lug measurement of 50 mm and a water-resistance rating of 100 metres. Self-winding calibre 8R46 contains 34 jewels and has a power reserve of approximately 45 hours. A crocodile leather strap closes with a folding clasp with push-button release. The hands and indices carry LumiBrite; a display back reveals the movement. Movement accuracy is minus 15 to plus 25 seconds per day. The lug width measures 20 mm. A curved sapphire crystal with an anti-reflective coating on the inner surface covers the dial.