What are the case specifications of the Grand Seiko Heritage?

The Grand Seiko Heritage features a 40mm diameter, 12.8mm thick, Titanium case with a sapphire crystal crystal.

What is the water resistance of the Grand Seiko Heritage?

The Grand Seiko Heritage has a water resistance rating of 100m (swimming).

What movement does the Grand Seiko Heritage use?

The Grand Seiko Heritage is powered by a Spring Drive, caliber 9R65, 72h power reserve.

Grand Seiko Heritage

Spring DriveTitanium

Ref. SBGA445

Collection: HeritageCase size: 40mmMovement: 9R65

The Grand Seiko Heritage, reference SBGA445, is a Spring Drive watch with a 40 mm titanium case. The dial is covered by a box-shaped sapphire crystal with an inner anti-reflective coating. Spring Drive calibre 9R65 has 30 jewels and approximately 72 hours of power reserve. Case thickness is 12.8 mm, with a lug-to-lug measurement of 47 mm; water resistance is rated to 100 metres. The watch has a date display, a power reserve indicator, and a see-through case back. This model has a titanium bracelet with a folding clasp with push button release.

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Last updated 9 Oct 2026Suggest a correction