Seiko Prospex SPB481J1 Full Technical Specifications
| Category | Component | Detailed Specification |
|---|---|---|
| Movement | Caliber Number | Seiko In-House Caliber 6R55 |
| Movement Type | Automatic with manual winding capacity | |
| Power Reserve | Approximately 72 hours (3 full days) | |
| Jewels | 24 jewels | |
| Frequency | 21,600 vibrations per hour (3 Hz) | |
| Functions | Stop-seconds hand function (hacking) / Date display | |
| Stated Accuracy | +25 to -15 seconds per day | |
| Case & Build | Case Material | Stainless steel with super-hard coating |
| Case Size | Diameter: 41.3mm / Thickness: 12.5mm / Length: 48.2mm | |
| Lug Width | 20mm | |
| Glass Material | Sapphire crystal | |
| Glass Coating | Anti-reflective coating on inner surface | |
| Bezel | Unidirectional rotating steel bezel / Polygonal / 120 clicks | |
| LumiBrite | Luminescent paint on hands, index markers, and bezel pip | |
| Band & Clasp | Bracelet Material | Stainless steel with super-hard coating |
| Clasp Type | Three-fold clasp with secure lock / Push-button release with extender | |
| Operations | Water Resistance | 300m / 1000ft diver’s watch (ISO certified) |
| Magnetic Resistance | 4,800 A/m | |
| Weight | 179.0 grams | |
| Other Features | Screw-case back / Screw-down crown / Textured coastline dial |
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