Seiko Men's Prospex SPB503J1

Watch Specifications

Movement

- Caliber: 6R55
- Movement Type: Automatic with manual winding
- Daily Accuracy: +25 / -15 seconds per day
- Power Reserve: Approximately 72 hours (3 days)
- Jewels: 24
- Functions: Stop second hand function

Case & Band

- Case Material: Stainless steel with super hard coating
- Case Thickness: 12.7 mm
- Case Diameter: 39.5 mm
- Lug-to-Lug: 46.4 mm
- Crystal: Sapphire crystal with date magnifier
- Crystal Coating: Inner anti-reflective coating
- Luminous Feature: LumiBrite on hands and hour indices
- Clasp: Three-fold clasp with push button release
- Lug Width: 20 mm

Additional Features

- Water Resistance: 20 bar
- Anti-Magnetic Resistance: 4,800 A/m
- Weight: 147.0 g
- Key Design Features: Rotating compass bezel, screw-down crown, see-through screw case back