
Product Description
The Seiko SPB331J1 is part of the Black Series — a stealth-inspired diver’s watch built for exceptional night visibility. Featuring Green Lumibrite Pro, a hard-coated stainless-steel case, and the reliable 6R35 automatic movement, this limited-edition model blends toughness, utility, and distinctive design.
| Case & Exterior | |
|---|---|
| SKU | SPB331J1 |
| Case Material | Stainless steel (hard coating) |
| Case Size | Thickness: 12.3mm Diameter: 43.8mm Lug-to-lug: 48.6mm |
| Crystal | Sapphire crystal |
| Crystal Coating | Anti-reflective coating on inner surface |
| LumiBrite | Green Lumibrite Pro on hands, index(es), and bezel |
| Bezel | Unidirectional rotating bezel |
| Clasp | Three-fold clasp with secure lock & push button release |
| Water Resistance | 200m / 660ft diver’s |
| Magnetic Resistance | 4,800 A/m |
| Weight | Approx. 185 g |
| Features | Screw-down crown Screw case back |
| Movement & Specifications | |
|---|---|
| Caliber Number | 6R35 |
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 70 hours |
| Precision | +25 to −15 seconds per day |
| Jewels | 24 |
| Functions | Stop second hand function Date display |
| Special Edition | Black Series Limited Edition |
| Case Back | Engraved LIMITED EDITION |
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