Discover the first Patek Philippe wristwatch with a grande sonnerie in its purest manifestation, complemented with a petite sonnerie and a minute repeater.

Given its 703 parts, the caliber GS 36-750 PS IRM is remarkably compact for such a complex mechanism (diameter: 37 mm; height: 7.5 mm).

It is equipped with two tandem-connected twin mainspring barrels, one for the going train and the other for the chiming mechanism. This configuration delivers a power reserve of 72 hours for the movement and of 24 hours for the strikework.

Thanks to the energy stored in the twin mainspring barrel of the strikework, the Grande Sonnerie strikes an impressive total of 1056 strikes in 24 hours

Fully rooted in Geneva’s watchmaking tradition, Patek Philippe began to produce striking watches from the outset.

In September 1839, four months after it was founded, the manufacture entered the first timepiece of this kind in its journal, a pocket watch with a repeater.

Today, with a dozen models, they constitute the broadest selection of regularly produced minute repeater wristwatches, be they pure repeater models or combined with further complications (tourbillon, perpetual calendar, chronograph, World Time, etc.).