I have yet to keep this clock running for any extended period of time. Sometimes a whole week, sometimes 3 or 4 hours, sometimes maybe 5 minutes. With 5 minutes most recently. I've had it out of the case numerous times, and on the bench it runs great. But in the case, I can hear something rubbing. Problem is, in the case I can't see it in order to be able to find out what it is. If you want to see what it looks like take a look here: My new clock, what is it? Muller-Schlenker? On these the pendulum and gong assembly is mounted to the back of the case. Last time I had it out I lubed the slot in the pendulum and the leader going into it. Then, it ran for a couple of hours maybe. Maybe I can figure out a way to mount the whole thing on a flat board and hang it on the wall so I can see. I have a video.... mostly to listen to not look at. Forget the background music and you can hear it.