How do you access chime in the lithium watch aw77004?

I haven't found a shortcut yet, but this one works on my AW77004; I press the "mode" button to set the time (mine is three presses), press "reset" till the hours blinks, hold down the "st./stp." to cycle through the hours. As it cycles, the right side will display "H" for military time, or cycle through "A" and "P" for civilian time. If you have the patience to let it cycle through 48 hrs, it toggles the "H". Hope this helps.