The integrated chronograph is one of the most subtle complications which can be created. It relies on kinematics with a chain of actions, each one determining and triggering the next, and each sequence precisely synchronised and adjusted. Even the tiniest imperfection has a knock-on effect, travelling down the line like a series of dominoes, disrupting the entire movement.
All the components of this hand-wound movement, which include a chronograph, a split second function and a large date, sit on the same main plate, with no additional module. The house calibre PF361 features several cutting-edge technological innovations: a 5 Hertz movement (36,000 vibrations per hour), column wheels replacing a cam, a vertical clutch rather than a horizontal one, a "cock" balance secured by a transverse bridge instead of a single attachment point. These developments add accuracy, reliability, stability and robustness to the movement.
To underline its prestige, the "Tonda Chronor Anniversaire" is driven by a gold calibre. The cases - in white or rose gold - strike a perfect balance with the grand feu enamel of the dial.