Blancpain celebrates 70 years of the Bathyscaphe with a stunning 37.4mm tribute to a 1968 classic. We explore the design, $18,300 price tag, and the impressive 100-hour Caliber 1150 inside this 300-piece limited edition.

Constructing a grande sonnerie is already among the most challenging feats in watchmaking. Adding a second, independently tuned melody requires a completely different mechanical sequence, extra components, and extremely precise coordination between the hammers, gongs, and regulators. Blancpain developed a system that allows the wearer to switch melodies without compromising sound clarity, volume, or durability.