![Aidophedo P1 Skeleton Automatic Mechanical Watch Men's Japan 4r39 Seiko-movement Self-winding Men Wrist Watches Sapphire Clock - Mechanical Wristwatches - AliExpress Aidophedo P1 Skeleton Automatic Mechanical Watch Men's Japan 4r39 Seiko-movement Self-winding Men Wrist Watches Sapphire Clock - Mechanical Wristwatches - AliExpress](https://ae01.alicdn.com/kf/Heb061e10649f45d288077d9a2d63d770S/Aidophedo-P1-Skeleton-Automatic-Mechanical-Watch-Men-s-Japan-4R39-Seiko-Movement-Self-winding-Men-Wrist.jpg)
Aidophedo P1 Skeleton Automatic Mechanical Watch Men's Japan 4r39 Seiko-movement Self-winding Men Wrist Watches Sapphire Clock - Mechanical Wristwatches - AliExpress
![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/nl-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
![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/nl-en/-/media/Images/GlobalEn/GrandSeiko/Home/news/20220330-1/202203301img02png.png)