I have a forestville wall clock with the pull down weights. when it chimes it is behind in time. example nine oclock chimes seven oclock, it is a made in germany clock but what year i do not know. there are three screws at the top which i believe are for the chime inside. it always chimes two behind the correct time

Stop the pendulum of the clock exactly at any even hour. Lets say at 6.00. While clock is steady and not working, pull off the minute and hour hands off the pinion, but do not brake them. You have to pull without any twisting action. This will leave pinions exactly in place they were when you stopped the clock. When it is done - push the hour hand back onto the pinion and make sure it is pointing at 4 (not 6, as it was when you stopped the clock). When hour hand is back in place and pointing at 4, push back minute hand as it was when you pulled it off - pointing at 12. Make sure hands will not catch when passing each other (you can bend them slightly if needed). Now swing pendulum to start the clock and adjust time (clockwise only). Never adjust time when clock is chiming. Rate me, plz.