Koru Single Spiral Metal Sign

About the Single Spiral design

A white channel enters this black disc at the upper left, splitting the rim so the steel peels away in a thin tapered hook. From there the gap winds inward about one and a half turns, tightening as it goes, and finishes in a small round pocket at the center. A tiny spur of steel pokes into that pocket like a thorn. The outer edge wobbles slightly rather than running as a true circle, which gives the disc the look of a hand-rolled coin.