Key Specifications: Seiko Prospex SPB483J1
| Category | Component | Specification Detail |
|---|---|---|
| Movement & Power | Caliber | In-house Seiko 6R55 (Automatic / Manual winding) |
| Power Reserve | 72 hours (3 full days) | |
| Frequency | 21,600 vibrations per hour (3 Hz) | |
| Accuracy | +25 to -15 seconds per day | |
| Jewels | 24 jewels | |
| Exterior & Styling | Dial | Cobalt blue with stamped ocean wave pattern |
| Bezel | Polygonal (8-sided) unidirectional rotating titanium carbide | |
| Crystal | Flat sapphire with inner anti-reflective coating | |
| Lume | Seiko LumiBrite on hands, hour markers, and bezel pip | |
| Case & Bracelet | Material | Stainless steel with super-hard scratch-resistant coating |
| Case Diameter | 41.3 mm | |
| Case Thickness | 12.5 mm | |
| Lug-to-Lug | 48.2 mm | |
| Lug Width | 20 mm | |
| Weight | 179.0 grams | |
| Clasp | Three-fold clasp, secure lock, push button, diver extension | |
| Function & Protection | Water Resistance | 300 meters / 1,000 feet (ISO-certified professional diver) |
| Magnetic Resistance | 4,800 A/m | |
| Case Back | Screw-down solid case back | |
| Crown | Screw-down crown at 4 o’clock | |
| Date Display | Circular window between 4 and 5 o’clock |
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