Patek Philippe "Advanced Research" Fortissimo Ref. 5750P features a unique fortissimo “ff” system for sound amplification and propagation.

Crowned by four patents, the fortissimo module offers the harmonic quality and acoustic richness that underpin the unique reputation of Patek Philippe minute repeaters.

In a classic minute repeater, the strikes of the hammers on the gongs create oscillations of the entire watch and the case material has a significant influence on the sound.

In the minute repeater with the fortissimo module, the sound is routed to an oscillating wafer solely via a sound lever and transmitted to the outside by four openings at 12, 3, 6, and 9 o'clock in a titanium ring. Thus, the case material does not influence the sound and its propagation.

As was the case previously with the “Advanced Research” innovations, Patek Philippe is launching a limited special edition to present the exclusive fortissimo module: the reference 5750P.