SEIKO SSB427

 Caliber 8T63 Quartz Movement: ±15 s/mo accuracy; approx. 3-year battery; 24 h hand, small-seconds subdial, 60 min chronograph (1/5 s increments) & date
 Case: 41.5 mm Ø × 12.1 mm thick; 46.5 mm lug-to-lug; Hardlex crystal
 Bracelet & Clasp: 22 mm lug width; three-fold push-button release clasp
 Water & Magnetic Resistance: 10 bar (100 m); 4 800 A/m
 Other: Screw-down case back; weight 133 g