Grand Seiko Heritage Collection

The Hi-Beat calibre inside this Grand Seiko oscillates at 36,000 vibrations per hour — ten beats a second — which buys resistance to positional error and a smoother sweep than a conventional movement delivers. Building a movement that runs that fast without sacrificing longevity is genuinely difficult, and few manufactures attempt it. Around it sits a case Zaratsu-polished by hand against a rotating tin plate, with diamond-cut indexes applied individually.

Reference: SBGH347G
Movement: Automatic Hi-Beat 36000, calibre 9S85
Power reserve: approx. 55 hours
Case: Steel, 37 mm
Water resistance: 100 m
Year: 2026 — Full set