Seiko SRPJ81
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 41 hours |
| Functions | Stop second hand function, Day/Date display |
| Case Material | Stainless steel |
| Case Thickness | 12.5 mm |
| Case Width | 36.4 mm |
| Case Material | Stainless steel |
| Crystal | Curved Hardlex |
| Water Resistance | 10 bar |
| Weight | 114 g |
| Features | Three-fold clasp with secure lock; See-through & Screw case back |