Bvlgari Replica Watches timepieces gave rise to a new horological aesthetic, set a new standard for horological craftsmanship, and, most significantly, housed dual movements that synchronize themselves via mechanical resonance a feat that alluded wristwatch makers until 1999 when Monsieur Journe finally made it work. Mechanical resonance is the tendency of two objects oscillating at the same frequency to influence and strengthen one another. Dramatic examples of mechanical resonance include buildings that sway violently (and sometimes collapse) when earthquakes shake them, or a crystal glass shattering when a singer hits a very specific note. In the case of two small watch movements oscillating adjacent to each other, however, forces are relatively weak, and Journes design uses these weak resonances to synchronize the two movements, which, in turn, improves accuracy.
We can think of the resonance in the overall system as a kind of communication that goes on between the two free-sprung balance wheels. No one questions that the balance wheels generate resonance, but some skeptics have questioned whether they can respond to it. Witnessing the movement in action, however, indeed confirms that the two balance wheels do, indeed, synch up with each other.
It turns out that the rigidity of the plates that hold the balance wheels keeps the conversation at hushed levels, allowing for communication without disruption to the system. In Journes movement, three specific adjustments control the distances between components in order to synchronize the two free-sprung balances. According to Journe, his Resonance timepieces achieve the greatest accuracy in a mechanical timepiece to date.
Journes Resonance movement is adjusted in three places for synchronization between the two movements. The most critical is at point #1, where a rack and pinion system moves the right-hand balance cock to an optimal position.
Knowledge of mechanical resonance synchronizing pendulums dates back to at least Galileo, and successful deployment of dual pendulums in clocks dates back to the early Enlightenment. Most notably, French watchmaker Antide Janvier built a few regulator clocks in which the hour and minute hands are driven separately by two pendulum-powered movements that communicate via resonance. On the smaller scale of watches, however, it was Louis Breguet who first experimented with mutually-resonating dual movements in pocket watches, and it was Breguet who first suspected, and then scientifically debunked, the idea that atmospheric turbulence was causing the synchronization by running the system in a vacuum chamber. Breguet, like many of us, was surprised to find that the two movements actually do communicate via mechanical resonance, but his greater surprise (and, we assume, delight) was to confirm that the two movements, once synchronized, reduce each others inaccuracies just as they do in dual-pendulum clocks.
Journe followed up Breguets achievement in Montre deux movements, 185 years later when he became the first to achieve a functioning resonance in a wristwatch in 1999. Without discounting the efforts of his predecessors, its fair to say that it was Journe alone who put mechanical resonance wristwatches into play.
Journes design presents two entirely independent watch faces bolted to the dial, allowing the owner to track dual time zones. Though his bolted-on design looks familiar today (imitators abound), critics disparaged it back in the 1990s, a time when serious horology was not yet trading in avant-garde aesthetics. Today, however, Journes design is regarded as a modern classic, one which appears to abide tradition when up against the whimsy of other independently-made modern watches like MBFs sci-fi-inspired Horological Machines, Konstantin Chaykins cross-eyed Joker Watch, or Richard Milles candy-adorned Bonbon collection. Arguably, Journes bolted-on sub-dials helped define the new traditions of this millenium.