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The Grand Seiko Heritage Reference SBGA301 represents the peak of modern Japanese horological engineering, blending traditional artistry with revolutionary mechanics. At its core ticks the proprietary Calibre 9R65 Spring Drive movement—a marvel of watchmaking that combines the high torque of a mechanical mainspring with the incredible precision of an electronic quartz regulator. The result is a completely fluid, dead-silent sweep of the seconds hand that is entirely unique to Grand Seiko.
This specific reference is a highly desirable model originally sourced and purchased directly in Japan. Its deep black dial is a masterclass in understated elegance, serving as the perfect backdrop for the diamond-cut hands and multi-faceted indices that catch the light from every conceivable angle. The case features Grand Seiko’s legendary Zaratsu polishing, a mirror-finish technique executed by hand that creates distortion-free surfaces and razor-sharp, crisp transitions. Preserved in very good condition, having only been worn a few times, this watch shows only light surface hairline scratches on the bracelet. Offered as a complete full set, it represents a perfect entry or addition for the collector who appreciates impeccable technical execution.
Grand Seiko Heritage | Spring Drive | ref. SBGA301 from 2020
BRAND: Grand Seiko
MODEL: Heritage Collection Spring Drive
REFERENCE: SBGA301
YEAR: 2020
MOVEMENT: Spring Drive Automatic Calibre 9R65
CASE DIMENSIONS: 40.5mm (Thickness: 12.1mm)
CASE MATERIAL: Stainless Steel
GLASS: Dual-Curved Sapphire Crystal
BRACELET: Original Grand Seiko Stainless Steel Bracelet
CLASP: Original Grand Seiko Three-Fold Clasp with Push-Button Release
BOX & PAPERS: Yes (Full Set - Original Grand Seiko boxes, manual, and Japan-issued warranty papers)
TAX: Differential taxation according to §24 UStG
MOVEMENT: Proprietary Calibre 9R65 Spring Drive automatic movement. Running flawlessly with its characteristic ultra-smooth sweeping seconds hand and keeping near-perfect time within factory specifications. Power reserve indicator operates perfectly.
DIAL: Flawless deep black dial with highly polished, multi-faceted steel indices and a date window at 3 o'clock.
GLASS: Dual-curved sapphire crystal with anti-reflective coating on the inner surface, completely scratch-free.
HANDS: Original diamond-cut, razor-sharp steel hands in pristine condition, showing no oxidation or marks.
CASE: Stainless steel case featuring crisp Zaratsu-polished bevels and brushed surfaces. Preserved in very good condition with minimal signs of wear.
CROWN: Original stainless steel screw-down crown with the GS logo, operating smoothly and locking securely.
