Grand Seiko SLGW002

Evolution 9 Collection | Limited Edition

Grand Seiko ‘Birch Bark’ 18k Rose Gold Hi-Beat Limited Edition


This item will be released 1 August 2024.

Learn more about this timepiece, let us arrange your personal consultation at a time to suit you.

This watch will be available in August


This piece is limited to only 80 pieces worldwide.

In 1968 the 45GS launched as the first Grand Seiko with a 10-beat manual winding movement. The 2024 ‘Birch Bark’ introduces the first Grand Seiko 10-beat manual winding movement in 50 years: the in-house built 9SA4.

This piece presents a new dial pattern, inspired by the horizontal patterns on white birch tree bark – found in the forests near Shizukuishi studio where all Grand Seiko mechanical watches are crafted.

The Birch Bark features box sapphire crystal glass with an anti-reflective coating, revealing a silver-coloured dial. Crafted in an 18 carat rose gold case, this timepiece has a rose gold crown and clasp and hour and minute hand alongside a blue steel second hand. Designed to be slim at less than 10mm in depth it is accompanied by a crocodile leather strap.

The exhibition case back showcases the new in-house 9SA4 10 beat manual-winding calibre, accurate to +5/-3 seconds per day, with a power reserve of approximately 80 hours due to its twin barrels and efficient dual impulse escapement. The mechanism is based on the 9SA5 movement, but has a newly designed manual-winding mechanism, a new bridge shape, and a new wheel finish. The power reserve is now located on the bridge for convenience.

Every Grand Seiko features signature high standards of precision, durability and legibility, handcrafted in Japan by Takumi artisans.


Calibre: 9SA4
Movement Type: Automatic with Manual Winding
Mean Daily Rate: +5 to -3 seconds per day

*Prior to the assembly of the movement in a case, it undergoes testing in six different positions for 12 days in a controlled environment. The ‘mean daily rate’ is the average value of daily results from these tests.
Watch Exterior
Case Diameter: 38.6mm
Case Length: 45.4mm
Case Thickness: 10.0mm
Case Material: 18K Rose Gold
Case Back: Case back with 6 screws, See-through case back
Strap/Bracelet: Crocodile Leather
Lug Width: 20.0mm
Clasp: Three-fold clasp with push button release
Dial Colour: Silver
Other Specifications
Crystal Coating: Anti-reflective coating on inner surface
Crystal Type: Box shaped sapphire crystal
Water Resistance: Splash Resistant
Magnetic Resistance: 4,800 A/m
Other Specifications: LIMITED EDITION on the case back, Serial number engraved on the case back, Power reserve indicator

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