Seiko SPB331J1
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 70 hours |
| Functions | Stop second hand function, Date display |
| Case Material | Stainless steel (hard coating) |
| Case Thickness | 11.1 mm |
| Case Width | 39.3 mm |
| Case Material | Stainless steel (hard coating) |
| Crystal | Sapphire crystal |
| Water Resistance | 10 bar |
| Weight | 83.0g |
| Features | LIMITED EDITION on the case back; Serial number engraved on the case back; See-through & Screw case back |