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Blancpain Grande Double Sonnerie Opens a New Frontier in Grand Complications
Press release: Blancpain Grande Double Sonnerie Opens a New Frontier in Grand Complications, Two selectable melodies, a flying tourbillon and a retrograde perpetual calendar define Blancpain’s most complex wristwatch to date. Blancpain’s Grande Double Sonnerie brings together three of traditional watchmaking’s most demanding complications.

