Patek Philippe launched the Ref. 5236P Embedded Perpetual Calendar

The brilliant new perpetual calendar.

Soon after launching Nautilus Reference. The Patek Philippe 5711/1A is green and is covering up something more serious in the mechanical aspect-Ref. 5236P embedded perpetual calendar.

Obviously inspired by vintage perpetual calendar watches (such as refs). Ref. 3448 and 3450 (and dials made of old Calatrava). 5236P is one of the most famous Patek Philippe calendars in recent years, whether it is a design or a newly developed movement.

Very similar to the reference. The 5235 calendar-my highly rated watch, underestimated-a new model. The 5236P is equipped with a calendar module built from the ground up, which is as complex as some permanent perpetual calendar movements. It is supported by rare improvements and improved versions of cal. The 31-260 micro-rotor movement only found in references so far. 5235.

Although clearly inspired by historical design, the 5236P manages to be different-it is also the most eye-catching perpetual calendar in the Patek Philippe catalog. The design heritage is clear: reference. 5236P has the same case style as the reference number. 5235 calendar (I like it). Admittedly, the referee. The 5236P may be too large to be as elegant as fake Patek Philippe‘s most exquisite watch cases, but compared to most of the brand’s perpetual calendars, its size and unique design make it an extraordinary modern watch.

And reference. The 5236P has an elegant linear calendar display, which is particularly evident in vintage pocket watches. It is symmetrical, clear and easy to read, and is different from the traditional three-counter calendar layout of the Patek Philippe perpetual calendar.

In order to achieve a clear and slender linear display, Patek Philippe has manufactured an extremely complex calendar module, which requires 60% more parts (ie 118 components) than the traditional module of the brand.

This means reference. 5236P is an expensive watch, the price is about 40% higher than current perpetual calendar models (such as refs). 5327 or 5320. Those are platinum, and ref. 5236P is platinum, but it is very different.

In other words, the referee. The 5236P is a beautifully-looking watch with ideal historical inspiration and an impressive new movement, so it is very valuable.

Retro inspiration
referee. The 5236P platinum case has a diameter of 41.3 mm and a height of 11.07 mm, making it one of the larger perpetual calendars in the Patek Philippe catalog and is slightly larger than the case. 5235.

But the style is essentially the same as ref. 5235, characterized by straight tapered lugs and wide and flat bezel. Modeled after ref. Both the 3448 and 3450 are ideal perpetual calendar watches in the 1960s and 1970s. Despite their retro inspiration, the case has a modern feel.

Similarly, the dial reminds me of Ref. 5235. It has a distinct vertical texture, exactly the same as the reference. 5235, but painted with a gradient blue paint, darkened to black at the edges, giving it a smoky or smoky taste.

Platinum baton with hour markers and platinum baton pointer. The form of the finger-shaped counterweight or the “horse” second hand will be slightly developed.

Cal. The 31-260 PS QL is derived from the movement of the base movement. 5235, and a newly developed perpetual calendar module with multiple patents. (The “PS” and “QL” suffixes in the movement name are the abbreviations for the small second hand, which are “small second hand” and “online perpetual calendar” respectively.)

Although similar to the movement in ref. 5235 (ie standard 31-260 REG quality inspection), the movement in the new model. From the basics to the display, 5236P has been completely redesigned.

First, the energy required to drive the perpetual calendar increases, requiring a 20% increase in the torque transmitted by the mainspring, and a corresponding increase in the winding efficiency of the rotor. Therefore, the micro-rotor is now platinum, which is denser than the 22k gold found in references. 5235 movement.

More interestingly, the movement’s beat rate has been increased to 28,800 beats per hour or 4 Hz, instead of the reference standard 23,040 beats per hour. 5235. Even when the calendar display is changed at midnight, the stability of timekeeping can be improved.

With ref’s single bridge, the aesthetics of the movement has also been improved. The 5235 movement is divided into two finger bridges, each of which is used for the fourth and escapement wheels. The train’s graceful finger bridge three people to the referee. The movement of the 5236P is more classically beautiful, reminiscent of the movement of an old pocket watch.

Although the expression of the perpetual calendar mechanism is simple, it is very complicated-the calendar module itself consists of about 298 components, which is more than the number of the entire perpetual calendar movement.

The calendar mechanism is cleverly constructed to be very thin but very practical. It is centered on four large discs that display the date, date and month in a single linear window. The disc is located on “two coplanar double ball bearings”, and Patek Philippe has applied for a patent.

The calendar is a “drag” or gradual mechanism in which the display changes over a period of time around midnight. In accordance with Patek Philippe’s practice, all calendar displays are set via embedded buttons in the case strap.

Patek Philippe In-line Perpetual Calendar
Ref. 5236P-001

Diameter: 41.3 mm
Height: 11.07 mm
Material: Platinum
Crystal: Sapphire
Water resistance: 30 m

Movement: Cal. 31-260 PS QL
Functions: Hours, minutes, seconds, and in-line perpetual calendar with moon phase
Frequency: 28,800 beats per hour (4 Hz)
Winding: Automatic
Power reserve: 38-48 hours

Strap: Alligator with platinum folding clasp

Year: 2021