Koru Open Spiral Metal Sign

About the Open Spiral design

A heavy black arm leaves the rim at the lower right in a broad swell and rolls inward, thinning steadily until it ends in a sharp hooked point. That point tucks into a small round eye of white near the center and nearly pinches it shut. Around the arm, a white channel opens from a thin sliver beside the rim and widens as it sweeps over the top and down the left side. An unbroken black ring closes the whole curl inside a perfect circle.