Seiko SPB451J1
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 72 hours(3 days) |
| Functions | Stop second hand function |
| Case Material | Stainless steel |
| Case Thickness | 13 mm |
| Case Width | 40 mm |
| Case Material | Stainless steel |
| Crystal | Curved sapphire crystal |
| Water Resistance | 300m / 1000ft diver's |
| Weight | 168 g |
| Features | Unidirectional rotating bezel; Screw-down crown; Three-fold clasp with secure lock; Screw case back |