Do you know? In 2011 Cartier released a new version of the screw system to minimize the potential of screw loss. Instead of the screws coming completely out when the Cartier love bracelet was opened or closed, they now remain attached to the bracelet. This single feature is also the easiest way of determining the approximate age of the famous bracelets. Is it ONS (original screw system) or NSS (new screw system)?