Seiko Prospex

The Seiko Prospex, reference SNJ031, is a chronograph with a 47.8 mm case. The watch has an alarm. The case is 14.4 mm thick, with a lug-to-lug measurement of 50.5 mm and a water-resistance rating of 200 metres. Solar-powered calibre H851 operates for approximately 6 months when fully charged. The dial is covered by a Hardlex crystal; the watch has a silicone strap; the dial has LumiBrite on the hands and indices. Movement accuracy is plus or minus 15 seconds per month; a screw-down crown is part of the case. The case has a hard coating; the lug width measures 22 mm. This watch has a unidirectional rotating bezel.