Thanks everyone. Perhaps my question seems nitpicky, but I was thinking that if the clock is rewinding too frequently, perhaps it will break again sooner (more "fatigue").
Yes, I have it hooked up to a power supply at 12.5V, and have been adjusting the knob on the back to get it to read the correct time. It was about 5 minutes slow per day, but now I have it correct to within a minute after many days. For kicks, I have now changed the power supply voltage to 13.5 to see if that makes a difference. That test is on-going.
The article at the link below says to clean the clock mechanism with soap/water and the lubricate the bearings with fine clock oil. It then goes on to say to NOT lubricate the "jewelled balance-wheel bearings". Can anyone help me understand which those bearings are? I don't want to lube the wrong things.
1972 VDO Kienzle Clock - Mercedes-Benz Forum