Shinshu in Nagano Prefecture, the region where all Grand Seiko Spring Drive watches are created, was once a major
center of silk production. Pulling from that history, Grand Seikos latest include SBGA437, SBGA439, and
SBGA467, three Spring Drive models featuring silken sunray dials, and SBGA465 with a special dial inspired by glistening frost.
Measuring 40mm in diameter by 12.3mm in thickness, the stainless steel case of all four references is representative of the contemporary interpretation of the Grand Seiko Style. The case features long, faceted lugs that emerge
from the mid case and curve down to the bracelet, offering comfortable ergonomics all around. At a length of just 46.6mm from the tip of one lug down to the other, the case is designed for a wide range of wrist sizes.
The geometry of the case is emphasized by its dramatic finishing, which combines hairline brushed surfaces and Zaratsu polished planes boasting a mirror like, distortion free reflection. The crown at three screws down, the case
is rated to 10 bar, and a solid case back protects the movement within. Altogether, the case is designed for reliable day to day wear. SBGA437 The silk sunray pattern radiates outwards and catches the light at every angle. It has a soft texture, not unlike the finest silk, which can only be created by the application of soft silver using a special method of silver plating.