The TONDA PF Gregorian Annual Calendar Steel Platinum Warm Grey by Parmigiani Fleurier represents a true revolution in the approach to the annual calendar, perfectly balancing mechanical sophistication and aesthetic purity. At the heart of this timepiece lies the PF339 manufacture caliber, a technical marvel that offers a retrograde date, day, month, precise moon phase for 122 years, as well as hours, minutes, and seconds. Despite the wealth of information, this watch achieves exceptional readability through an ingenious dial layout. By placing the date on the periphery, Parmigiani Fleurier preserves the characteristic aesthetic of the TONDA PF line while providing complete functionality. The watch also stands out for its design: finely skeletonized solid gold hands, a platinum bezel, and a sophisticated case structure that assert its elegance. The TONDA PF Gregorian Annual Calendar Steel Platinum Warm Grey, with its integrated bracelet and architecture reflecting the skill of a master