Grand Seiko Evolution 9 Collection

The Tentagraph is the first mechanical chronograph Grand Seiko has ever built, and the name states the achievement: ten beats per second, 36,000 vibrations per hour, sustained across a three-day power reserve. Running a chronograph at that frequency without sacrificing autonomy is genuinely difficult, and the movement uses a dual-impulse escapement developed in-house to manage it. The titanium case is Zaratsu-polished by hand.

Reference: SLGC001G (Tentagraph)
Movement: Automatic Hi-Beat chronograph, in-house calibre 9SC5
Power reserve: approx. 72 hours
Case: Titanium, 43.2 mm
Water resistance: 100 m
Year: 2026 — Full set