Model WE9003Z3, Serial 300888143NX 18kt white gold Cartier Ballon Bleu with fixed 18kt white gold bezel set with diamonds. Silver opaline dial with blue hands and Roman numeral hour markers. Minute markers around an inner ring. Luminescent hands and dial markers. Battery operated calibre 057 quartz movement. Scratch resistant sapphire crystal. 18kt white gold fluted crown with sapphire cabochon. Case diameter: 28.5 mm.