What makes the Audemars Piguet Supersonnerie chime so loud?

Описание к видео What makes the Audemars Piguet Supersonnerie chime so loud?

The Supersonnerie represents a real breakthrough in the world of chiming watches. Not only is it louder than any other minute repeaters, but it is also waterproof, something very unusual for such timepieces. Discover all about this very special Audemars Piguet in this video report.

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