Cartier Ballon Bleu W69012Z4. Polished steel 42mm case which is water resistant to 100ft. Automatic Cartier Calibre 049 movement. Silver guilloche dial with black Roman numeral hour markers. Blued hands. Date display at the 3 o’clock position. Steel bracelet with a double folding clasp. Box and papers dated April 2011. Our reference S21703.