Grand Seiko Heritage

The Grand Seiko Heritage, reference SLGA028, has a 40 mm yellow gold case. Spring Drive calibre 9RA2 provides approximately 120 hours of power reserve. The case measures 12.1 mm thick and 47.4 mm lug-to-lug, with a water-resistance rating of 100 metres. A box-shaped sapphire crystal has an anti-reflective coating on the inner surface. The watch has a date display, a power reserve indicator and a see-through case back. A yellow gold bracelet closes with a butterfly clasp. Movement precision is ±10 seconds per month, equivalent to ±0.5 seconds per day.