or greater reliability and more user-friendliness
To optimize the efficiency, precision, durability, safety, and operating convenience of the caliber 31-260 PS QA LU FUS 24H movement, the engineers developed several innovations that resulted in eight patent applications. For instance, these technical refinements make it possible to reduce the energy consumption and wear of certain components, to switch from the 30th
to the 1st
and from the 1st
to the 30th
without desynchronizing the calendar when adjusting the time zone, to prevent shifts and double jumps of the displays or avoid damaging parts of the movement if the moon phase, the month, or the day of the week are corrected in a time frame during which this is explicitly inadvisable.
The sapphire-crystal case back reveals the architecture of the caliber 31-260 PS QA LU FUS 24H movement with the elegantly cut and gently curved bridges. It affords a better view of the wheels of the base movement and the exquisite manually executed finissage that reflects the strict directives of the Patek Philippe Seal.
with a guilloched hobnail pattern
To accommodate this mechanical movement with its exclusive functions, Patek Philippe created a new white-gold case with a diameter of 41 millimeters. With its slightly chamfered bezel and the polished, inclined lugs, it underscores the sleek and timeless elegance of the Calatrava design yet expresses its very own distinctive personality. The case middle displays Patek Philippe’s signature hobnail motif along its entire circumference. The subtly shining pattern of tiny pyramids was showcased on the bezel of the famous Ref. 3919 Calatrava “Clous de Paris”
in 1985; it was produced for over 20 years and became one of the best-known models of the watch world. In 2021, it experienced a strong comeback in the new, highly contemporary Ref. 6119 Calatrava “Clous de Paris”
that is made in rose gold and white gold. On the case of the Ref. 5326G-001 Annual Calendar Travel Time, it provides a new perspective of this very refined element of the Patek Philippe style. To allow the hobnail pattern to so elegantly adorn the complete flank of the caseband, Patek Philippe conceived an exceptional case design in which the strap lugs are attached to the case back.
Another unique facet of the Ref. 5326G-001 is its vintage-style dial. It is crafted entirely by Cadrans Flückiger in Saint-Imier, a dial specialist which has belonged to Patek Philippe since 2004. The dial is charcoal gray with a fine gradation to the periphery and has a slightly granular structure that is reminiscent of the cases of old photo cameras. It is an aspect that quickly associates with getaways, wanderlust and exploration. The time of day is shown by applied Arabic numerals in white gold with beige luminous coatings. The hours of local time and the minutes are displayed with luminous white-gold “Seringue”
hands that with their long tips resemble syringes. A pierced “Seringue”
hand indicates the hours of home time. The three apertures of the Annual Calendar – day of the week and month on one line at 12 o’clock, date at 6 o’clock – show easily legible black inscriptions on white backgrounds. Two small round windows marked “LOCAL”
at 8 o’clock and “HOME”
at 4 o’clock are day/night indicators for local time and home time, respectively. This balanced arrangement is complemented by the subsidiary seconds that sweeps the moon-phase aperture at 6 o’clock. The calendar indications can be adjusted with the aid of small correctors in the caseband located near the respective functions: day at 10, month at 2, date at 4 and moon phases at 8 o’clock. The vintage aspect is emphasized with a slightly raised box-design sapphire-crystal glass.
The new Ref. 5326G-001 Annual Calendar Travel Time is delivered with two interchangeable straps, one beige calfskin with nubuck texture (original version), the other black calfskin with embossed textile finish and beige decorative stitching (additional strap). Both straps underscore the vintage style of the dial. They both assure comfort and safety with a fold-over clasp in 18K white gold.
In its quest to repeatedly develop new functions and complications, Patek Philippe can rely on over 180 years of uninterrupted experience that allow it to offer reliable and exceptional models. The new Ref. 5326G-001 is a fine example. When creating its timepieces, the manufacture always leverages its entire know-how for the benefit of its customers. It is resolutely handed down from one generation to the next and belongs to the rich heritage of technical progress crowned by over one hundred patents. The Annual Calendar and the Travel Time mechanism perfectly illustrate Patek Philippe’s customer-centric development philosophy – now, they have come together in the new Ref. 5326G-001.
For those who particularly appreciate the exclusive design of the new Ref. 5326G-001, Patek Philippe can offer a further watch in the Calatrava collection with the same aesthetic looks for the case and dial but with a somewhat smaller diameter (40 millimeters) and without additional functions. This new Calatrava Ref. 5226G-001 in white gold with a guilloched hobnail motif on the caseband is powered by the self-winding caliber 26-330 S C movement with center hour, minute, and second hands and an aperture date at 3 o’clock. It, too, is delivered with two interchangeable straps similar to those that come with the Ref. 5326G-001. It is another perfect fusion of movement, case, and dial the Patek Philippe way.
The eight patents of the new caliber 31-260 PS QA LU FUS 24H movement
- Timesetting with three crown positions (Swiss patent application CH 716383 A2)
This timesetting system has a lever with three positions that can deactivate certain wheels as long as they are not performing any correction. This reduces energy consumption and wear of the respective wheels. The result is a gain for the balance amplitude (rate accuracy) and for reliability
- Forward/backward mechanism for the Annual Calendar (European patent application EP 3776095 A1)
This system relies mainly on the addition of a tooth and a spring on the month lever that allows the transition from the 30th to the 1st and from the 1st to the 30th without desynchronizing the date. Therefore, the user can easily switch the time zone forward or backward with the winding stem.
- Linear time-zones spring (European patent EP 3650953 B1)
This system consists of a star wheel and a jumper spring. It allows a strong torque increase between the local time hour wheel and the home time hour wheel and thus an acceleration of the date jumps despite the increase in energy consumption. It provides the user with more precise information.
- Pivotable holding bridge (European patent applications EP 3714336 A1 and 070431/2021)
This system keeps the day disc in position without the use of a center screw. To remove the disc, the watchmaker merely needs to pivot the bridge to the side. This releases the star without requiring the disassembly of the movement and without any modification of the settings. This timesaving and simplification is part of the improvements in watch maintenance.
- Inertial delta (European patent application EP 3822711 A1)
This mechanism offsets the inertia difference between a heavier and a lighter wheel. When the time zone is being corrected in either direction, it prevents an unintended forward or backward misalignment of the time displays (home time, local time, minutes). This increases the accuracy of the displays.
- Braking mechanism for the date disc when a correction is made (European patent application EP 3882716 A1)
This system with an additional spring (brake) is only active when the crown is pulled to the middle position. It prevents double jumps of the date disc if the user exerts too much force. It safeguards the greater reliability of the mechanism (amplitude gain and wear reduction).
- Flexible correctors (European patent application 20205322.9)
With a system of flexible leaf springs for switching protection purposes, this mechanism prevents the risk of a material failure when the user performs a correction during an unfavorable time window. This improves the reliability and longevity of the movement.