Seiko SNDC31

The Seiko reference SNDC31 is a chronograph with a 40.2 mm steel case. The case measures 10 mm thick, with a water-resistance rating of 100 metres. The movement is quartz calibre 7T92, which has a battery life of approximately 36 months. The dial is covered by a Hardlex crystal; LumiBrite appears on the hands and indices. The movement has an accuracy of plus or minus 15 seconds per month. The case has a lug width of 20 mm. Elapsed time is measured in increments of 1/20 second. The watch has a leather strap.