Silver & Bone Otter Pendant Pin

This is an absolutely adorable pin that is wonderfully crafted in high relief and features an otter holding onto what appears to be a shell of some sort. The bone carving is whimsical, displaying the mischievous personality of this little otter. The back is signed K in a circle and 925. Maker is unknown, but judging from the workmanship, I believe it to be from the Northwest, possibly done by a Native American. Pin measures 1 3/8" in diameter. There is a loop for a pendant or one may wear it as a pin. There are no cracks or chips to the bone carving. The sterling is somewhat oxidized with some slight denting on the edges.