Vacheron Constantin 1140

Caliber 1140 is a manual-winding, 2-register chronograph introduced by Vacheron Constantin in 1975 and now discontinued. It is based on the Lemania 2320, making it one of the few VC movements built on an external ebauche rather than an in-house caliber. The movement belongs to the manufacturer's 11xx family of тонкий механизм, though precise specifications such as diameter, thickness, frequency, and power reserve are not documented in available sources. It represents a transitional period in the brand's history when select chronographs were sourced from specialized suppliers rather than developed internally.