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. SBGA443

Collection: HeritageCase size: 40mmMovement: 9R65

The Grand Seiko Heritage, reference SBGA443, is a Spring Drive watch with a 40 mm titanium case. The case measures 12.8 mm thick and 47 mm lug-to-lug; water resistance is rated to 100 metres; the case has a screw-down crown. Approximately 72 hours of power reserve is provided by Spring Drive calibre 9R65, with 30 jewels. The watch has a date display, a power reserve indicator, and a see-through case back. A box-shaped sapphire crystal has an anti-reflective coating on the inner surface. The titanium bracelet has a folding clasp with push button release.

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Last updated 9 Oct 2026Suggest a correction