Howard Millar 610-778. About 15 years old. Moved it a to an adjacent room a few years ago (down 2 steps). Put the weights on backwards (left and right swapped) worked fine for a few years and chime stopped a couple of years back. Swapped the weights back properly and no difference. Time keeping function works fine if chimes are off. Will get stuck at 5min after the hour if chime is on. Did some testing spinning the minute hand forward – Will chime music at 15, 30min mark – Will not chime music at 45min mark. But if I give the spinning plate a little kick or apply a little force on the cable wheel. I can hear a brief mechanical noise at 35min mark – Will not chime music and in turn will not chime hour. But if I lift an internal lever, it will do both Not sure if its a simple need of oiling (never oiled since purchase 15 years ago) or the swapped weights operating for a few years damaged it.