The bowl doesn't have the round blob in the middle, starting it all off, and the beaked vase does have
thick what might have been wiggles if they were not stretched out in the neck!
Another general thought I've had is that they changed the design of Earthtones fairly early on, from random trails to a spiral. Later on, there was a different way of executing Earthtones with random re-introduced.
The execution of random Earthtones can vary considerably, from fabulous to seriously ropey. The spiral must have been easier to execute.
I do not know whether or not that was when Harris was still there, but given IoWSG Tortoiseshell is a spiral too, it cannot be ruled out. On the other hand, it doesn't take too much imagination to come up with a spiral, it could as easily have happened independently.
My cobalt tricorn has a spiral all over it, Harris did do spirals at Mdina.
But nobody need even have seen that, to have come up with it themselves either.
Shall we continue to talk strapping and its executions here, with lots of examples?
This discussion does seem to be turning into something quite useful.

So I'm going to post images of my two most utterly fabulous Earthtones pieces.
And one image of a much later execution, with the random re-introduced.