Building the Patek Philippe Grande Sonnerie

As Patek Philippe's Honorary President Philippe Stern once said, "Platinum is unquestionably the most challenging metal for a minute repeater, simply because its density is 30% higher than that of gold, and this can have an impact on the richness of the sound.” The same is of course true for any chiming watch, which made the building of Ref. 6301P even more challenging.

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The new caliber GS 36-750 PS IRM fulfills all the strict requirements of the Patek Philippe Seal. This applies to the technical parameters (rate accuracy, dependability) and to the finissage and attractive architecture of the individual components. Special attention was devoted to the design of the movement bridges, especially the barrel bridge (a key element of grande sonneries) and the balance bridge. Connoisseurs will also discover many other aesthetic details, including the many reentrant angles that are very difficult to polish.

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