Cheers for the response, Ray.
The Wado-kai symbol is a dove, and this pin I'm pretty sure is a crane (longer beak, different wings etc)
something much closer to the image on the left, which is which apparently is one of the kamon used by the Mōri clan. on the right is my attempt to distort one of the angled views of the pin into an approximation of what it might be flat, using photoshop.
I was hoping someone might have some specific info.
cheers,
Dale