Why is this happening? The movement was just restored!
Every SWCC owner asks that question eventually. It turns out that it is normal. Consider the sequence that occurs at winding:
1. Cam lifts contact and just touches
2. Vibration from motor causes cam to back off slightly
3. Winding Stops
4. Movement advances cam further until contact occurs once again.
5. Winding commences again. Sometimes, the above can and does repeat.
The above sequence will continue until tension on the contact is more than the vibration can affect. At this point winding, which is inevitable, finally occurs and completes. Customers sometimes observe that this effect comes and goes over time.
Should you worry about it? Absolutely not! Your clock will not stop because of this.
Now, if the movement has never been restored, contacts are coated with filth and grime, then it is possible that this could be a sign that the clock is about to give you problems. But with a newly restored clock, this is not a sign of trouble, even after several years post-restoration.
If your clock is powered by one of our regulated battery products such as the Model 1900R, hesitation or drawn-out winding may also mean that it is time for a battery recharge. Nonetheless, hesitation due to contact effect is the more likely explanation.
After perhaps 3-4 years, it is a good idea to have us look at your movement, clean contacts, touch up oil, and inspect for any problems that might be developing (rare).