In 2001 Vacheron Constantin won the Grand Prix d’Horlogerie de Genève for their Laday Kalla watch. It runs on a caliber 1005 and is displayed on the Vacheron Constantin site:
If you look carefully, you will see that even today, the name on the main bridge is Vacheron & Constantin. Does this mean that the caliber 1005 was created before the name change to Vacheron Constantin (without the '&') in the early 70s and the caliber is still in use from an earlier manufacture?
Earlier this month I found what I thought was a certain fake because the watch face showed "Vacheron Constantin" and the movement showed "Vacheron & Constantin"; however, there's a current movement with 'Vacheron & Constantin' on a legitimate prize-winning watch. Another mystery for Sherlock Ghotbi!