Cartier rolled out the Ballon Blue collection back in '07, sporting a sleek and rounded case. One of its standout features is the sunken crown and its unique imprint on the dial.Check out the W6920095 model for a stainless steel case and a rose gold crown, complete with a silver dial. It runs on the self-winding caliber 049 and comes with a stainless steel and rose gold bracelet.