A screw-down crown helps protect your watch from moisture and dust. While wearing the watch, the crown should always be left in the locked position. Release the crown by turning counter counter-clockwise (down toward the 6 o'clock position). You will then be able to extend the stem in order to set the time, date, day, etc. When finished setting the timepiece, lock the crown back in place. Make certain that the stem is pushed all the way in, then apply light pressure and turn clockwise (up toward the 12 O’clock position) until the crown tightens into place.