Grand Seiko Sport: The Apex of Diver’s Engineering
The Grand Seiko Sport SBGA461G is a high-impact 44.2mm timepiece that fuses legendary Zaratsu polishing with Spring Drive 9R65 technology. Designed to meet the stringent ISO 6425:2018 standards, this diver is a masterclass in professional utility and luxury hand-craftsmanship.
Visual Audit: Technical Depth and Zaratsu Clarity
Our visual audit confirms a sophisticated palette of matte black and polished silver, designed for the diver who demands absolute legibility and a multi-faceted wrist presence.
- Matte Black Dial: A light-absorbing surface featuring oversized indices affixed via a swaging process for maximum shock resistance.
- Unidirectional Rotating Bezel: A technical frame with a 60-minute scale, designed for easy maintenance and disassembly.
- LumiBrite Integration: High-intensity luminous coating on all twelve markers and hands for world-class visibility in total darkness.
Material Verification: Professional-Grade Japanese Engineering
The SBGA461G is constructed using premium 316L stainless steel and internal-AR sapphire glass to ensure lifelong durability and a substantial feel.
- Zaratsu-Polished Steel: A distortion-free mirror finish applied to the case and bracelet by Takumi artisans in Japan.
- Sapphire Crystal: A scratch-proof glass face with an anti-reflective inner coating for perfect clarity under water.
- Slide Adjuster Bracelet: A robust steel bracelet featuring a secure-lock clasp and an instant-expansion slide adjuster for wetsuit compatibility.
Mechanical Functionality: The Spring Drive 9R65 Movement
Beneath the matte dial lies the unique Spring Drive movement, offering the soul of a mechanical watch with the precision of an electronic regulator.
- Glide Motion Second Hand: A continuous, silent sweep that reflects the true flow of time without the “tick” of quartz or “beat” of mechanicals.
- ±1 Second Per Day Accuracy: A high-torque hybrid movement providing chronometric precision and a 72-hour power reserve.
- 200m Water Resistance: Engineered for professional diving, featuring a screw-down crown and a reinforced case architecture.
Technical Specifications
| Attribute | Specification |
|---|---|
| SKU Reference | SBGA461G |
| EAN Code | 4954628242402 |
| Case Size | 44.2 mm (Men’s) |
| Movement | Spring Drive Calibre 9R65 |
| Accuracy | ±1 Second per Day |
| Material | Stainless Steel |
| Water Resistance | 200 Metres (20 ATM) |
| Functions | Glide Motion, Power Reserve Indicator, Date, Diver’s Ext. |
The Grand Seiko SBGA461G is delivered in an official Grand Seiko luxury presentation box and includes a 5-year international manufacturer’s warranty.
