Seiko SGEH90

The Seiko reference SGEH90 has a 40.6 mm steel case. The case is 9.7 mm thick, with a lug-to-lug measurement of 47.8 mm and a water-resistance rating of 100 metres. The movement is quartz calibre 7N42, which contains 1 jewel and has a battery life of approximately 60 months. The dial is covered by a curved Hardlex crystal. The movement has an accuracy of plus or minus 15 seconds per month. The case has a lug width of 20 mm. The clasp has a three-fold construction with a push-button release mechanism.