Seiko Prospex

The Seiko Prospex, reference SBER003, is a chronograph with a 42 mm steel case. The case is 12.9 mm thick, with a lug-to-lug measurement of 48.3 mm and 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 watch has magnetic resistance; elapsed time is measured in increments of 1/100 second. The clasp has a three-fold construction with push-button release.