Patek Philippe 5140J Perpetual Calendar The Ref. 5140J is presented in a 37.20 mm yellow gold case, like the other Grand Complications of the Manufacture, this model is equipped with two interchangeable backs. The watch is presented with a sapphire caseback through which the complexity of the mechanism and its high quality of finishes can be admired: beveled bridges, pearl plate, bridges and rotor adorned with “Côtes de Genève” motifs. The solid yellow gold caseback it can only be fitted by an authorized Patek Philippe dealer. With its sophisticated mechanism and refined classic design, the Extra-Flat Perpetual Calendar stands out as one of the most beautiful examples of Patek Philippe technique and style. A model of legend A classic complication par excellence, the Perpetual Calendar has always held a place of honor in the Patek Philippe collections. Since 1839 (the year the manufacture was founded) in regards to pocket watches, and since 1925 for wristwatches, numerous are these marvels of watchmaking mechanics that have sculpted the soul of metal, interpreting the subtle ballet of Hundreds of parts, wheels, pinions, stars, cams and scales. The extra-flat Perpetual Calendar with a perfectly balanced dial has established itself as one of the most famous Patek Philippe complicated watches. A very stylish box. The round case of Ref. 5140 preserves the sober and harmonious lines that have contributed to the success of the Patek Philippe Perpetual Calendar. However, it has now been given a slightly larger diameter that underlines its extra-flat profile. The concave bezel has been replaced by a convex-shaped bezel that enhances the smoothness of the shapes, and the lugs have been streamlined to give the watch / bracelet ensemble more elegance. A model of sharpness and balance. To give a new impetus to this classic among classics, Patek Philippe has opted for the original dial of the first piece, the purest, the most timeless, with its three perfectly balanced auxiliary dials. By increasing the size of the case slightly, it has managed to lighten the whole set, while enhancing its readability. Subtle detail: with the date being the most important indication, Patek Philippe designers have enhanced its visibility by increasing the diameter of the auxiliary dial of the date at 6 o’clock, and this without modifying the dimensions of the other two dials. The day indication is visible in the 9 o’clock position, as well as the 24-hour indication, which is very useful to distinguish between day and night when the calendar is adjusted. The dial in the 3h position indicates the month, while a second hand in its center indicates whether or not it is a leap year. The perpetual calendar is completed with a window for the phases of the moon integrated in the auxiliary dial of the date at 6 o’clock, a mechanism of such extraordinary precision that it takes 122 years and 45 days for it to deviate a single day from it. of the actual cycle of the moon. The silver opaline dial with subtle reflections is adorned with applied gold “obus” indexes and two “dauphine” hands for hours and minutes. The self-winding Caliber 240Q is made up of 275 parts and is distinguished by its extra-flat profile (3.88 mm). This feat is due to the 22-karat gold eccentric mini-rotor that is built into the mechanism, as well as the ingenious arrangement of the perpetual calendar mechanism and the moon phases. With its mechanical memory of 1,461 days (4 years), the perpetual calendar automatically indicates the exact date, with programming of the months of 31, 30 and 28 days, as well as February 29 of leap years. It will only be necessary to correct it one day in 2100, a secular year in which the Gregorian calendar exceptionally suppresses February 29. All calendar indications are easily adjusted by means of the four quick correctors built into the sides of the case. The Patek Philippe comes on a hand-stitched shiny black large scale crocodile leather strap, 2008 18K yellow gold folding clasp (never polished) with outer and inner case. With documentation (extract from files). With one year warranty. Patek Philippe with very little use, like new.