SEIKO SRPD57

 Caliber 4R36 Automatic Movement: Automatic with manual winding, \~41 hr power reserve, 24 jewels, stop-second and day/date
 Stainless-Steel Case: 42.5 mm diameter × 13.4 mm thickness (46 mm lug-to-lug), 22 mm lug width
 10 bar Water Resistance & 4,800 A/m Magnetic Resistance
 Hardlex Crystal with LumiBrite: Durable glass; luminous hands & indices
 Unidirectional Rotating Bezel for timing
 See-Through & Screw-Down Case Back showcasing the movement
 Secure Three-Fold Clasp with push-button release and safety lock