Mammalian neck vertebrae with iron trade arrowhead embedded, bone has been evaluated by a veterinarian and deemed to be from a large quadruped, most likely elk. The embedded arrowhead is a 200 to 400 year old trade item. The exact location of discovery is unknown, but species and arrowhead type suggest Great Plains origin. Bone is 6 inches wide, and arrowhead is approximately 2 inches long. This is very rare item, with few authentic examples known to exist. RR Auction COA.