Here are a couple of mottled brown/tan dry process strains like none I've seen before. They're 2-¾" long by 1-3/8" wide. There's a mold line all the way around that doesn't show in the photos, and the spiral is continuous from one end to the other. The keyhole-shape through holes appear to be hand-carved. I'm not sure they've ever been used as they're both dead mint. Can't see where any have sold before, so let's try $40 for the pair shipped in the US.