Experience Unparalleled Precision: The IWC ProSet Perpetual Calendar – Intuitive, Reversible, Revolutionary.

A New Era of Perpetual Calendar Adjustment: Seamless Forward and Backward Corrections

The IWC ProSet's most notable feature is its ability to adjust the calendar both forward and backward. This eliminates the common frustration of overshooting a date on traditional perpetual calendars, which often requires a lengthy wait or complex manual resetting. With the ProSet, a simple turn of the crown in either direction instantly corrects the date, ensuring optimal user convenience.

Overcoming Traditional Perpetual Calendar Challenges: A Solution for Effortless Correction

Conventional perpetual calendars are often characterized by their intricate adjustment mechanisms, typically involving multiple recessed pushers that demand precise sequencing to set the day, date, month, and leap year. Furthermore, many systems operate unidirectionally, meaning a mistake necessitates cycling through the entire calendar to realign. The IWC ProSet addresses these complexities by offering a crown-operated system that allows synchronized, bi-directional adjustments, simplifying the process and making corrections quick and safe. This innovation, while recalling Ludwig Oechslin's pioneering Ulysse Nardin Perpetual Ludwig from 1996, pushes the boundaries of user-friendly design.

The Ingenious Core of the IWC ProSet: A Centralized Program Wheel

At the heart of the IWC ProSet lies an entirely redesigned movement that centralizes the calendar logic within a single, stacked Program Wheel. Unlike traditional perpetual calendars that disperse their 'memory' across various cams, this innovative mechanism integrates approximately 20 components into a compact, vertically stacked assembly. This 'brain' comprises multiple wheels rotating at different speeds, including an annual wheel for monthly transitions and a leap year wheel for the quadrennial February cycle, ensuring precise and synchronized calendar progression.

Mastering February's Irregularity: Retractable Fingers for Precise Date Transitions

To accurately account for February's variable length (28 or 29 days), the IWC ProSet employs flexible components with "retractable fingers." In contrast to traditional mechanical calendars where a lever 'feels' cam depths, this system utilizes three fingers driven by interactions with the annual and leap year wheels. These fingers intelligently extend or retract, engaging the date-advance wheel at the exact moment required, enabling the gear to seamlessly transition from the 28th or 29th directly to March 1st.

Effortless Operation: A Gear-Driven Design for Intuitive Bi-Directional Adjustment

The ProSet mechanism excels in user-friendliness, thanks to its fully gear-driven and programmed architecture. This design eliminates the need for levers and spring-loaded jumpers, preventing potential jamming. The constant and synchronized meshing of gears allows the crown to smoothly control the entire calendar train in both forward and backward directions, enabling seamless bi-directional adjustments and enhancing the watch's overall reliability.

Unprecedented Lunar Accuracy: The Moon Phase Display's Remarkable Precision

IWC's engineers have also meticulously refined the reduction gear for the ProSet's moon phase display. Through precise recalculations, they have achieved an extraordinary level of accuracy, with a deviation of only one day after an astounding 1040 years. This remarkable precision underscores the brand's commitment to horological excellence and innovation.

Advanced Manufacturing: LIGA Technology for Compact and Intricate Components

The creation of this sophisticated mechanism was made possible through the integration of 26 LIGA-manufactured components, including flexible elements. LIGA technology offers significant advantages in producing intricate and highly precise parts that would be challenging to achieve with traditional methods. The extreme thinness of these components allows for a compact stacked architecture, contributing to both the mechanism's efficiency and the overall refined design of the watch.

ProSet Perpetual Calendar Debuts in a Trio of Exquisite Editions

The innovative ProSet perpetual calendar is launched in three distinct versions. The Big Pilot's Watch Perpetual Calendar ProSet 'Le Petit Prince' and the standard Big Pilot's Watch Perpetual Calendar ProSet are available in 42mm cases, crafted from steel (IW329601) and elegant pink gold (IW329602) respectively. A third variant, also a 'Le Petit Prince' edition (IW339601), features a 43mm white ceramic case and a captivating deep blue dial with a gradient finish. These refined dimensions introduce a more subtle yet sophisticated presence to the iconic Big Pilot collection, reflecting a contemporary trend towards more understated proportions.

Seamless Strap Changes: The EasX-CHANGE System for Enhanced Versatility

The steel and ceramic versions of the IWC ProSet are equipped with the innovative EasX-CHANGE system. This ingenious feature allows wearers to quickly and easily swap out straps or bracelets (for the steel model) without requiring any tools. This enhances the watch's versatility, enabling effortless customization to suit various styles and occasions, further elevating the user experience.