I recent acquired a grandfather clock. All was well until last week when I went to adjust the time and moved the minute hand forward about 20 mins. For this clock I believe you are only supposed to turn the minute hand backwards. Up and till this, the clock would chime on the hour, with one strike per the hour. (1) chime for 1 o'clock (3) chimes for 3 o'clock etc etc till 12 o'clock. Now, its OK up until 6 o'clock (6 chimes), but for 7 thro' 12 o'clock it only strikes (6) times. At 1 o'clock its back to a single chime again. Any thoughts on what I can try? When the minute hand is on the 12, the hour hand looks pretty much in synch.. Best regards Robert.