"Chronomètre à Résonance? An exceptional and unique creation in chronometer engineering, the Resonance System Chronometer exhibits the so-called phenomenon of resonance applied to horology. This unique wristwatch uses two entirely independent movements which operate harmoniously together for a precision greater than that of most mechanical wristwatches. The phenomenon of resonance is part of our daily lives, though we scarcely know it. When searching for a radio program, the radio crackles until the waves selected encounter those of the radio transmitter and become harmonized. Napoleon once forbade his troops to march over a bridge for fear of it collapsing from the effects of resonance! The phenomenon was observed as early as the 17th century by Christian Huygens, among others. The high-precision Constant Pressure regulators, still in use less than 40 years ago at the Observatory of Paris for the Bureau International de l'heure, and the radio broadcast time signal sent from the Eiffel Tower were placed in the Catacombs at a depth of 26 meters to eliminate fluctuations in temperature and atmospheric pressure. They were also kept in separate rooms to avoid any resonance interference. However, by the end of the 18th century, some of the most eminent clockmakers had found a way to take advantage of the phenomenon by synchronizing the pendulums of regulators fitted with two independent movements. When applied to a watch, resonance ensures exceptional reliability and precision. This is the only precision chronometer that is not affected by the wearer?s movements. Antiquorum sold the prototype of this watch in Geneva, on October 23, 1999, lot 75."Chronomètre à Résonance? An exceptional and unique creation in chronometer engineering, the Resonance System Chronometer exhibits the so-called phenomenon of resonance applied to horology. This unique wristwatch uses two entirely independent movements which operate harmoniously together for a precision greater than that of most mechanical wristwatches. The phenomenon of resonance is part of our daily lives, though we scarcely know it. When searching for a radio program, the radio crackles until the waves selected encounter those of the radio transmitter and become harmonized. Napoleon once forbade his troops to march over a bridge for fear of it collapsing from the effects of resonance! The phenomenon was observed as early as the 17th century by Christian Huygens, among others. The high-precision Constant Pressure regulators, still in use less than 40 years ago at the Observatory of Paris for the Bureau International de l'heure, and the radio broadcast time signal sent from the Eiffel Tower were placed in the Catacombs at a depth of 26 meters to eliminate fluctuations in temperature and atmospheric pressure. They were also kept in separate rooms to avoid any resonance interference. However, by the end of the 18th century, some of the most eminent clockmakers had found a way to take advantage of the phenomenon by synchronizing the pendulums of regulators fitted with two independent movements. When applied to a watch, resonance ensures exceptional reliability and precision. This is the only precision chronometer that is not affected by the wearer?s movements. Antiquorum sold the prototype of this watch in Geneva, on October 23, 1999, lot 75.