Hello, I'm working on an ETA 2752. The watch showed the following behavior: About 30 minutes before date-change the minute and hour hand stopped, but the second hand continued to run. Manual date change was possible. I think the reason is very low to zero friction in the cannon pinion with driving wheel.
Is it possible to increase friction in this part? How? Or do I have to look for a spare part? Thank you for any input.