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To mark its 62nd year, Grand Seiko introduces its first mechanical complication watch, the Grand Seiko Kodo Constant-force Tourbillon ($350,000). The most complicated watch the company has ever built, the Kodo's intricate structure features an open-work design that gives you a view of the constant-force mechanism and tourbillon that sit at the heart of the Caliber 9ST1 movement. The manually-wound movement has a power reserve of 72 hours and sits inside a 43.8mm case that's constructed out of platinum and titanium. The Grand Seiko Kodo Constant-Force Tourbillon will be available this fall and is limited to 20 pieces. 

From left to right: the Spring Drive GMT 9R66 ($8,400), Spring Drive Chronograph GMT 9R96 ($11,400-$12,400), and the Spring Drive 5 Days Caliber 9RA5 ($11,600).

From left to right: the Spring Drive GMT 9R66 ($8,400), Spring Drive Chronograph GMT 9R96 ($11,400-$12,400), and the Spring Drive 5 Days Caliber 9RA5 ($11,600).

The company also introduced a range of new models in its Evolution 9 Collection with five new Spring Drive sport watches. These new models include two new GMTs, two GMT Chronographs, and a 200M dive watch. The watches feature cases and bracelets made out of high-intensity titanium, Lumibrite-coated hands and indexes, and a crown guard that is specifically designed to not catch on sleeves. 


$8,400-$350,000, grand-seiko.com

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