Jean-Marc Vacheron

Jean-Marc Vacheron (1731–1805) was a Swiss horologist and a founder of the Vacheron Constantin watch company. He was a close friend of leading Enlightenment philosophers Jean-Jacques Rousseau and Voltaire due to their common interests in philosophy, science and watchmaking.
Early life.
Jean-Marc Vacheron was born in 1731 in Geneva, Switzerland. His father was Jean-Jacques Vacheron.
Career.
Vacheron opened his watch shop in 1755.
His timepieces naturally bore the name "Jean-Marc Vacheron". At that time he was 24 years old and was one of many "cabinotiers"-watchmakers who specialized in the production of certain components, selling them to so-called "etablisseurs". The watchmakers were called "cabinotiers" in honor of the well-lit "cabinets" on the top floors of the houses in Geneva's Saint-Gervais neighborhood, where they worked.
Personal life.
Vacheron had five children. His sons Louis Andre (born in 1755) and Abraham (born in 1760) followed in his footsteps.
Death.
He died in 1805.