Chapter Two Tonneau

Chapter Two – Big Date Triple Calendar

In teaming several of the world's greatest living watchmakers with one of the world's most prestigious state-of-the-art movement manufactures, a very special timepiece is assured. With Chapter Two, renowned talent such as Master Watchmakers Daniel Roth and Peter Speake-Marin went beyond “very special”—they pushed the boundaries of haute horlogerie. The resulting timepiece features an instantaneous big date triple calendar that, thanks to innovative roller indications and the unparalleled experience of the master watchmakers involved, is the world's most legible calendar mechanical wristwatch, as well as the world's first unabbreviated triple calendar mechanical wristwatch!

Chapter Two features central hours and minutes indicated by elegant diamond-cut, solid gold hands, sub-seconds at 6 o'clock, big date at 12 o'clock, and the day and month spelled out in full on their respective rollers. The combination of a big date and full text for the days and months confers upon Chapter Two a legibility unprecedented in a triple calendar wristwatch.

“Chapter Two is the fruit of a collaboration of very experienced and professional master watchmakers. It is totally unlike anything that any of us would have done alone but is the result of us working together,” explains Daniel Roth.

The long flowing lines of the distinctive tonneau case belie its complex architecture and sophisticated design. Myriad thoughtful details and sagacious finishes catch the light. Every aspect of the timepiece has been meticulously refined: the inside curves of the lugs match the flow of the case, ensuring absolute harmony, while the day, date, and month correctors are engraved with their functions for ease of operation. A total of six shaped, anti-reflective sapphire crystals—three on the front and three on the caseback—ensure unmatched visual access to both the indications and movement.

Chapter Two's technically groundbreaking movement was developed in close collaboration by its highly experienced master watchmakers and was extensively tested, refined, and decorated until Chapter Two satisfied their most exigent standards. In particular, the mechanism for driving the rollers demanded significant technical and inventive reflection to obtain the most efficient and reliable system possible. The fact that the big date and both rollers change instantaneously bears testament to the success of their innovative design and high-precision manufacture.

“To ensure sufficient force in the construction of the calendar, the transmission of power through the movement had to be very efficient, consuming minimum power turning the large rollers, so we had to master the horological challenge and use the latest technology. One aspect which was crucial in the design was the fabrication of the rollers in ultralight material,” says Peter Speake-Marin.

Turning Chapter Two over reveals a caseback unlike anything that has gone before. Two ergonomic, paddle-shaped pushers to adjust the day and month are engraved with their respective functions, and the displayed month or day on the dial side is cleverly indicated on the back through geometrically complex sapphire crystals. This is a detail that eliminates the need to turn the watch over while adjusting the roller functions and is typical of the deep level of thought Chapter Two's experienced masters have devoted to its development and design. The date corrector, seamlessly blending with the lines to the crown, also has its function engraved on the back. As you might expect of the superstar lineup that developed Chapter Two, every single detail has been carefully considered.