The Cartier Vendôme was introduced in the 1970s as an homage to the famed Place Vendôme square where the flagship Cartier boutique is located. The Vendôme introduced a round case, quite uncommon for Cartier, and lacked the traditional vertical lugs that connect the case to the bracelet. The Vendôme Bi-Plan sports the same round case and introduces two horizontal lugs that connect to the leather strap. If you look closely, you’ll notice that the lugs are not even connected to the watch case. That’s because they are, in fact, part of an ingenious mechanism that incorporates the deployant clasp in the caseback of the watch. In practice, this means that you open and close the bracelet by lifting up and pressing down the watch case.