Product Description
The Seiko SPB451J1 offers a compact 40mm professional diver’s format with a curved sapphire crystal, strong LumiBrite visibility, and durable 300m construction. Powered by the 6R55 movement with a 72-hour reserve, it is crafted for reliability and everyday performance.
| SKU | SPB451 |
|---|---|
| Case Material | Stainless steel |
| Case Size | Thickness: 13.0mm • Diameter: 40.0mm • Lug-to-lug: 46.4mm |
| Crystal | Curved sapphire crystal |
| Crystal Coating | Anti-reflective coating on inner surface |
| LumiBrite | LumiBrite on hands, index(es) & bezel |
| Water Resistance | 300m / 1000ft diver’s |
| Magnetic Resistance | 4,800 A/m |
| Distance Between Lugs | 20 mm |
| Weight | 168 g |
| External Features | Unidirectional rotating bezel Screw-down crown Three-fold clasp with secure lock Push-button release with extender Screw case back |
| Movement | 6R55 — Automatic with manual winding |
|---|---|
| Power Reserve | Approx. 72 hours (3 days) |
| Precision | +25 to −15 seconds per day |
| Jewels | 24 |
| Functions | Stop second hand function Central hours, minutes, seconds Date mechanism integrated in movement |
| Additional Notes | 6R55 is Seiko’s latest long-reserve mid-range automatic movement designed for stability, improved torque, and reliable accuracy in daily use. |
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