Seiko SSB257

The Seiko reference SSB257 is a chronograph with a 44 mm steel case. The case carries a water-resistance rating of 100 metres. Quartz calibre 8T67 has a battery life of approximately 36 months; the dial is covered by a Hardlex crystal. The dial has a date display, small seconds and a tachymeter. A three-fold clasp with push-button release fastens the watch. Movement accuracy is plus or minus 15 seconds per month. The lug width measures 22 mm; elapsed time is measured in increments of 1/5 second. LumiBrite appears on the hands and indices.