The following is a diagram of the Hermle mechanism w0340.
This depicts the top of the movement, around the balance wheel and escapement. Turn the Regulating spindle in very small increments (less than 1/16th of a turn) to adjust the timekeeping. Turning the spindle clockwise will slow the clock down, counter-clockwise will speed the clock up. Be sure to reset the hands each time you make an adjustment.
Our Sternreiter Brahms tambour and Sloan bracket clocks are equipped with a manual shut-off lever for the chimes.