Grand Seiko's first mechanical complication watch
Grand Seiko reaches a new milestone in the sixty-two year history of Grand Seiko with the introduction of the brand’s first mechanical complication watch, the Grand Seiko Kodo Constant-force Tourbillon. At its heart is a uniquely innovative movement that delivers a level of stable accuracy unprecedented for Grand Seiko by combining a tourbillon and a constant-force mechanism as one unit on a single axis for the very first time in horological history. The watch is named Kodo, the Japanese word for heartbeat. With its unique appearance when in motion and with its carefully designed sound, this revolutionary watch reveals its vitality both audibly and visually, thanks to the open-work design and the sapphire case back. Most remarkable of all is the way that the constant-force mechanism and the tourbillon have been integrated together to allow the creation of an overall design that is perfectly in harmony with the values of Grand Seiko and whose technical ingenuity is encased in a watch of great elegance and wearability.
|Exterior:||Platinum 950 and Brilliant Hard Titanium|
|Case back:||See-through case back|
|Case back with 6 screws|
|Glass Material:||Box shaped sapphire crystal|
|Glass Coating:||Anti-reflective coating on inner surface|
|Case size:||Diameter 43.8mm Lug-to-lug 50.6mm Thickness 12.9mm|
|Clasp type:||Three-fold clasp with push button release|
|Caliber no.:||9ST1 Instructions|
|Movement Type:||Mechanical manual winding|
|Power reserve:||Approx. 72 hours(3 days)(Constant-force: 50 Hours)|
|± seconds per month:||
+5 to -3 seconds per day
|Water resistance:||10 bar|
|Magnetic resistance:||4,800 A/m|
|Other details / Features:||
The three movements at the heart of Grand Seiko
One of the world's foremost mechanical movements, the culmination of high-precision micro-engineering and the attention to detail of Seiko's expert watchmakers.
Spring Drive is a unique movement that delivers one-second-a-day precision, using just the power of a mainspring.