Seiko SPB155J1
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 70 hours |
| Functions | Stop second hand function, Date display |
| Case Material | Stainless steel |
| Case Thickness | 12.9 mm |
| Case Width | 38 mm |
| Case Material | Stainless steel |
| Crystal | Curved sapphire crystal |
| Water Resistance | 20 bar |
| Weight | 144 g |
| Features | Screw-down crown; See-through & Screw case back |