The ronde solo preserves the perfectly pitched classical elegance and signature cartier features of the ronde de cartier watch that serves as its inspiration roman numerals blue sword shaped hands winding mechanism crowned with a sapphire and rail track minute circle the ronde solo watch features a steel version of the braceletronde solo de cartier watch large model quartz movement case in 18k pink gold and steel beaded crown in 18 k pink gold set with a synthetic cabochon shaped spinel