Greubel Forsey’s new Grande Sonnerie, the brand’s first chiming timepiece, is a powerhouse of a watch and a triumph of traditional acoustic design and tuning. During the 11 years they spent perfecting their design, company founders Robert Greubel and Stephen Forsey relied heavily on their wealth of experience with the complication to address potential problems with elegant solutions. A separate power system with its own rotor allows the sonnerie to function without interfering with timekeeping, and a host of proprietary safety systems protect the watch from inadvertent damage. But the timepiece’s most important quality is its chime. Driven by powerful springs, massive hammers (only partially seen through the dial aperture) strike the gongs with enough force to overcome the volume-dampening effects of the watch’s O-ring seals. The sound—perpetuated by its carefully machined and polished gongs—is a refined testament to the labor lavished on this watch. 212.221.8041 ($1.1 million).