Seiko SPC137

The Seiko reference SPC137 is a chronograph with a 44.5 mm steel case. The case measures 13.4 mm thick, with a water-resistance rating of 100 metres. The movement is quartz calibre 7T04, which has a battery life of approximately 60 months. The watch has a three-fold clasp with a push-button release mechanism. Movement accuracy is plus or minus 15 seconds per month. The lug width measures 21 mm. Elapsed time is measured in increments of 1/5 second. Over the dial is a sapphire crystal with an anti-reflective coating on the inner surface.