Grand Seiko Heritage

The Grand Seiko Heritage, reference SBGV223, has a steel case measuring 40 mm in diameter. The case has a thickness of 10 mm and a lug-to-lug span of 46.8 mm; water resistance is rated to 100 metres. A sapphire crystal has an anti-reflective coating on the inner surface. The watch has a date display; magnetic resistance is 4,800 A/m. A folding clasp with push button release closes the steel bracelet. Chamfered surfaces appear on the hands and hour indices. Timekeeping is provided by quartz calibre 9F82, which operates with a precision of ±10 seconds per year.