Seiko SPB505J1
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 72 hours(3 days) |
| Functions | Stop second hand function |
| Case Material | Stainless steel (super hard coating) |
| Case Thickness | 12.7 mm |
| Case Width | 39.5 mm |
| Case Material | Stainless steel (super hard coating) |
| Crystal | Sapphire crystal with magnifier |
| Water Resistance | 20 bar |
| Weight | 147 g |
| Features | Rotating compass bezel; Screw-down crown; See-through & Screw case back |