At the heart of the Grand Seiko Kodo Constant-force Tourbillon, a uniquely innovative movement 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 first Kodo launched last year expressed evening twilight through the delicate interplay of light and shadow that is central to Grand Seiko aesthetics, the new timepiece uses light and shadow to evoke daybreak.

For the first time in a Grand Seiko watch movement, blue sapphires are used for the jewels, adding an unexpected detail that is in perfect harmony with the design. Platinum 950 forms the watch’s inner case, while Brilliant Hard Titanium, an alloy twice as hard as stainless steel, forms the outer case, making the exterior highly resistant to scratches. Some of the case parts in both metals are Zaratsu polished to a distortion-free mirror finish, while others have a hairline finish.