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Grand Seiko's first mechanical complication combines a constant-force mechanism and a tourbillon as one unit on a single axis. | Grand Seiko
![Grand Seiko's first mechanical complication combines a constant-force mechanism and a tourbillon as one unit on a single axis. | Grand Seiko Grand Seiko's first mechanical complication combines a constant-force mechanism and a tourbillon as one unit on a single axis. | Grand Seiko](https://www.grand-seiko.com/us-en/-/media/Images/GlobalEn/GrandSeiko/Home/news/20220330-1/202203301img01png.png)
Grand Seiko's first mechanical complication combines a constant-force mechanism and a tourbillon as one unit on a single axis. | Grand Seiko
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