Grand Seiko
White Birch
SLGH005
Birch-bark texture meets Grand Seiko's most advanced mechanical movement.
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Overview
The Grand Seiko SLGH005, known as the White Birch, is a dress watch introduced in 2021 as part of the Evolution 9 collection. Its 40 mm stainless steel case houses the calibre 9SA5, a dual-impulse escapement Hi-Beat 36000 movement representing one of Grand Seiko's most significant in-house horological advances in decades. The dial's white textured surface evokes the distinctive bark of the white birch trees native to the Shinshu region surrounding Grand Seiko's Shizukuishi atelier.
History
The Evolution 9 collection debuted in 2021 to mark a new chapter in Grand Seiko's mechanical watchmaking, introducing both a refined case architecture and the brand-new calibre 9SA5. The SLGH005 was among the inaugural references in this line, pairing the technical milestone of the 9SA5 with a dial inspired by the natural landscape of Nagano Prefecture. The White Birch has since become one of the most recognised references in the Evolution 9 family, appreciated by collectors for the harmony between its nature-inspired dial and the precision of its movement.
Notable points
- Calibre 9SA5 features a dual-impulse escapement and a free-sprung balance, achieving Hi-Beat 36000 vph with an approximately 80-hour power reserve.
- The white dial is hand-finished to replicate the layered, papery texture of birch bark, a motif drawn from the forests near Grand Seiko's Shizukuishi Studio.
- Evolution 9 introduced a new case shape with a more pronounced lug curvature and a slimmer profile compared to earlier Grand Seiko generations.
- The 40 mm stainless steel case retains Grand Seiko's hallmark Zaratsu-polished surfaces, combining mirror-flat and brushed finishing.
- The SLGH005 is produced at the Shizukuishi Watch Studio in Iwate Prefecture, the dedicated home of Grand Seiko's mechanical watchmaking.
Specifications
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