Assess the condition of your Atmos clock
or, how well it performs after having been serviced.

By watching the arms of the balance as a reference, it is easy to see the amplitude of the balance and therefore assess the condition of the clock. A freshly serviced Atmos should have an amplitude of about 540°.

If the amplitude is less that 360°, your clock is due for a service.

....watch this video  as a reference

Alternatively, you can watch the video by connecting to  youtube