Cartier Ballon Bleu 42mm, model reference W69016Z4. This automatic winding timepiece has a 42mm stainless steel case that encases a crown set with a blue spinal cabochon. The dial is silver guilloché, with black romans, blue steel hands and date display aperture located at the 3 o'clock position. The Cartier Ballon Bleu comes on a black leather strap with a stainless steel deployant buckle.