There's a moment in haute horlogerie where technical mastery transcends engineering and enters the realm of pure emotion. It's the instant when a grande sonnerie watch doesn't merely chime the time—it sings it. For eight years, Blancpain has been chasing that moment in their manufacture in Le Brassus, and the result is the Grande Double Sonnerie, a wristwatch that rewrites the entire rulebook for what a grande sonnerie can be.