Chime timing will not stay correct
I have a Vienna Regulator probably from the early 1900s. It chimes the hour and once on the 1/2 hour.
We recently recieved this clock as it is passed down in the family. The clock was not working correctly and has been recently cleaned etc. to get it working again. It has worked fine for about 2 months.
Then it started to chime one hour behind the actual time. The clock was keeping the correct time just not chiming the correct time. I stopped the clock, moved the hour hand back one hour and restarted it when it was the correct time. Now only one week later it is off again. This time however, it is 2 hours behind. Again, it is keeping the correct time just not chiming the correct time.
Any thoughts would be appreciated. It has alot of sentimental value and I would like it to work but am nervous about getting it repaired.