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Grand Seiko Put a Tourbillon and Constant-Force Mechanism on the Same Axis

The Kodo is built around Grand Seiko's compact constant-force tourbillon, which integrates two demanding mechanisms concentrically. The visual result is unusually alive: the rotating carriage and one-second impulses create a mechanical rhythm you can see. Source: https://www.grand-seiko.com/us-en/news/2024/pr/20240409-2 Grand Seiko Put a Tourbillon and Constant-Force Mechanism on the Same Axis
Made by Grand Seiko Where Japan Source checked the link still resolves 19 Sep 2026
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