Grand Seiko Heritage

The Grand Seiko Heritage, reference SBGA507, is a Spring Drive watch with a 40 mm steel case and is a limited edition of 300 pieces. Above the dial is a dual-curved sapphire crystal, with anti-reflective coating on its inner surface. Measuring 46.2 mm lug-to-lug, the case is 12.5 mm thick; water resistance is rated to 100 metres. The watch has a date display, a power reserve indicator, and a see-through case back. The steel bracelet has a folding clasp with push button release. The textured dial draws on Japanese woodblock print techniques and the evening sky over Lake Suwa. Approximately 72 hours of power reserve is provided by Spring Drive calibre 9R65, with 30 jewels.