Artfully made from a single piece of Sperm whale panbone, this superb seam rubber is in classic scrimshaw form with a carved tetrahedral knob at the top. This sits above an especially artful handle shaft that is gracefully tapered toward each end with a hexagonal cross section. The blade has a slightly tapered wedge shape with an edge length of 2 inches. The overall length of 6 ¼ inches. The edge is nicely worn, showing that it has had use in creasing sail cloth and burnishing stitches. It is uncommonly Fine.