
Product Description
The Seiko SPB447J1 features a handcrafted urushi lacquer dial — each one unique — paired with a stainless-steel case with super hard coating and a dual-curved sapphire crystal. Powered by the 6R54 automatic movement with a 72-hour reserve and dual-time functionality, it blends Japanese craftsmanship with refined everyday versatility.
| SKU | SPB447J1 |
|---|---|
| Case Material | Stainless steel (super hard coating) |
| Case Size | Thickness: 12.4mm • Diameter: 40.2mm • Lug-to-lug: 48.0mm |
| Crystal | Dual-curved sapphire crystal |
| Crystal Coating | Anti-reflective coating on inner surface |
| Band Material | Cow leather |
| Clasp | Three-fold clasp with push-button release |
| Distance Between Lugs | 20 mm |
| Water Resistance | 10 bar |
| Magnetic Resistance | 4,800 A/m |
| Weight | 87.0 g |
| Features |
Urushi lacquer dial See-through & screw case back Each handcrafted dial has unique color variations and minute distortions |
| Caliber Number | 6R54 |
|---|---|
| Movement Type | Automatic with manual winding |
| Precision | +25 to −15 seconds per day |
| Power Reserve | Approx. 72 hours (3 days) |
| Jewels | 24 |
| Functions |
24-hour hand (dual time function) Stop second hand function |
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