Breguet: Another Stop-Work
The animations below show the mainspring being unwound from the perspective of the barrel with two different annulus sizes. From our (God's) perspective it is the barrel that rotates anti-clockwise. Because a suitable photograph of the arbor wheel was not available, it is shown as transparent grey.
Unwinding Large Annulus
Unwinding Small Annulus
Winding the mainspring is basically the same, except:
First the animation runs from the last frame to the first.
Second, the direction of rotation is anti-clockwise.
And third, the opposite sides of the slots in the barrel wheel are used.
So it is easy enough to visualise winding. To demonstrate this, the following animations were constructed by reversing the unwinding animations. As a result they show the arbor wheel finger acting on the wrong side of the slots!
These views are from our (and God's) perspective outside the watch.
Winding Large Annulus
Winding Small Annulus