Chronograph. The J12 Superleggera Chronograph is made from a black-matte high-tech ceramic, titanium, rubber and aluminum. This time piece is water resistant in up to 200 meters of water, making it one of the J12’s prized features. The case diameter measures in at 41 millimeters, making it a larger sized watch. The watch not only contains a second, minute and hour hand but it also has a date window as well as the chronograph and tachymeter functions.