An unusual antique.....

A friend purchased this antique quilt and she showed me this unusual treatment of the pieces nearest the edge of the quilt.  I have never seen this on a double wedding ring before and we wondered if any of my readers have ever seen it.

I cut strips for the 9 patches and started sewing them last night but haven't pressed any of them yet.  I am making more than I need for the border so I'll have seeds for another quilt.