Seiko SSB389

The Seiko reference SSB389 is a chronograph with a 41.6 mm titanium case. The case is 14.2 mm thick, with a lug-to-lug measurement of 49.1 mm and a water-resistance rating of 100 metres. Quartz calibre 8T67 has a battery life of approximately 36 months. The dial has a date display; the clasp has a three-fold construction with push-button release. LumiBrite is applied to the hands and indices. Movement accuracy is plus or minus 15 seconds per month. The lug width measures 20 mm; elapsed time is measured in increments of 1/5 second. Over the dial is a curved Hardlex crystal.