Noel, I have never see the Cycle of 5ths where the 5ths go counterclockwise and the 4ths go clockwise. In fact, this clock hangs in my studio.
Maybe it's a southern hemisphere thing like how your water drains in the opposite direction.
Love it!
Actually, it's all very confusing from a musical perspective...
Consider A to D to G to C....
If I think about that as "A going down to D going down to G going down to C," then I have a cycle of 5ths.
On the other hand, if I think of the same motion as as "A going up to D going up to G going up to C," then I have a cycle of 4ths.
So your clock and the image I posted are both simultaneously Cycle of 4ths and Cycle of 5ths (just to make matters more confusing).
I just like to think clockwise!
That's how the dominant motion seems to work best in my head. It probably is a southern hemisphere thing. As you say, the musical version of the Coriolis effect.
--Noel