The Calibre 9RB2 inside this watch is accurate to ±20 seconds per year - the tightest tolerance achieved by any movement powered by a mainspring in production. Grand Seiko’s Spring Drive technology has always occupied a peculiar category: a purely mechanical going-train regulated at the final stage by an electromagnetic glide wheel, borrowing almost nothing from quartz. The 9RB2 is its most refined expression yet.
The dial takes its name from the Kirigamine Highlands in midwinter - the landscape visible from the Shinshu Watch Studio where the movement is assembled. Rendered in silvery blue, it shifts tone across natural and artificial light. The case is high-intensity titanium, 30% lighter than steel, at 37mm - compact for an Evolution 9 reference. Unusually, the movement is user-regulable; the owner can adjust its rate at home.
This is a permanent catalogue reference, not a limited run. At this price point, that is a quiet statement of confidence.
£9,950 - grand-seiko.com