Caliber 4380/4390 Chronograph Movement - Parts Diagram
Exploded view diagram for the Citizen Caliber 4380 and 4390 chronograph movements, providing a detailed mechanical breakdown of these precision watch calibers. The parts diagram illustrates the complete assembly sequence, including the balance wheel assembly (178), escape wheel assembly (307), chronograph coupling components (922, 713, 078), gear train elements (213, 087, 088, 075), and the main plate with all integrated mechanical systems. The diagram covers both dial-up and dial-down configurations, making it an essential reference for technicians performing service, repair, or maintenance on these chronograph movements. Ideal for watchmakers and repair specialists needing accurate component identification and assembly guidance.
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Document Details
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- Watchmaking