The chronofighter oversize diver deep seal watch comes with a g1734 automatic bi compax chronograph calibre it performs 28 800 vibrations per hour its additional features include incabloc shock absorber 30 jewels and a 42 hour power reserve the chronograph has a number of features including a 30 minute register and centre seconds a date window is located at the 7 oclock mark a seconds sub dial appears at the 3 oclock mark