Step 2: Sometimes things get bent
This clock was found in an antique shop in New Mexico, and I paid substantially less than what the clock was actually worth, because it would not run. I noticed that there was a small dent in the wood of the case (indicating the clock had been dropped). What I found wrong was that when the clock had been dropped, the thin brass mount where the pendulum attached had been bent slightly. Straightening this mount fixed the clock. The pendulum on this clock, by the way, is hidden in the back of the clock.