SEIKO SSB399

 Caliber 8T63 Quartz Movement: ±15 s/mo; ≈3 yr battery; 24 h hand, small-seconds, 60 min chrono (1/5 s), date
 Case: 41.0 mm Ø × 12.3 mm thick (48.0 mm lug-to-lug); stainless steel (hard coating) with Hardlex crystal; 22 mm lug width
 Lume: LumiBrite on hands & indices
 Clasp: Three-fold push-button release
 Water Resistance: 10 bar; screw-down case back
 Weight: 152 g