Vacheron Constantin Disco Volante in 18 k yellow gold ref 6508Founded in 1755 by Jean Marc Vacheron in Geneva, Vacheron Constantin is the worlds oldest watch manufacturer in continuous operation. Known as part of the "Holy Trinity" of Swiss watchmaking, the brand merged with Franois Constantin in 1819, adopting the motto: "Do better if possible, and that is always possible." With a lineage stretching back centuries, the brand has been responsible for some of the most sophisticated and beautifully executed