Most visitors online was 1660 , on 12 Dec 2020
I will check into that. Many years ago the clock would stop at random times. I noticed one of the wheels was always in the same position when it stopped. I used a dial gauge to find the point that needed to be corrected and nudged it back.Also, since the wear is uneven(goes from heavy to slight), I’m guessing you probably have a bent arbor as well.