Seiko Prospex

The Seiko Prospex, reference SSG013, is a chronograph with a 45 mm steel case. The case measures 12.9 mm thick, with a water-resistance rating of 100 metres. Solar-powered calibre 8B92 contains 10 jewels and operates for approximately 6 months when fully charged. Over the dial is a curved Hardlex crystal with an anti-reflective coating on the inner surface. The dial has a date display; the watch has a leather strap. The hands and indices carry LumiBrite. Movement accuracy is plus or minus 15 seconds per month without signal reception at temperatures between 5 and 35 degrees Celsius. A screw-down crown is part of the case.