1950s Vacheron Constantin for Mouboussin

Caliber: 1005 (based on JLC101)
Movement: Hand-wound
Case: 18KYG
Bracelet: 18KYG

This rare piece was created by Vachron Constantin for Mauboussin, a jeweller founded in 1827 and headquartered on Place Vendôme in Paris.
It features a mechanical backwind structure based on the small movement "Duoplan" developed by Jaeger-LeCoultre.