Seiko SPB377J1
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 72 hours(3 days) |
| Functions | 24-hour hand (dual time display function), Stop second hand function |
| Case Material | Stainless steel (super hard coating) |
| Case Thickness | 13.6 mm |
| Case Width | 39.5 mm |
| Case Material | Stainless steel (super hard coating) |
| Crystal | Curved sapphire crystal |
| Water Resistance | 20 bar |
| Features | Screw-down crown; See-through & Screw case back |