SEIKO SSB423

 Caliber 8T67 Quartz Movement: ±15 s/mo; ≈3 yr battery; small-seconds hand, 12 hr chronograph (1/5 s) & date
 39.5 mm Stainless-Steel Case: 11.6 mm thick; 46.6 mm lug-to-lug; 20 mm lug width
 Sapphire Crystal & LumiBrite: Scratch-resistant glass; luminous hands & indices
 10 bar Water Resistance & 4 800 A/m Magnetic Resistance
 Screw-Down Case Back; Weight: 68 g