We have a large collection that has been collected over the last 100 years. Every piece was found in the ground by either my great grandfather through to me. There was a question on some of our larger pieces that they were reproductions. However I remember as a child bending over and picking up one of the large corner tangs we have. Any help would be appreciated in helping us find an authenticator in Utah near Salt Lake City. Than you all in advance. We are currently seeking potential buyers for the collection. All of our points were found on our farm in Melrose, NM or in the area of Arch, NM also some from our original farm in Abiline, TX and some near the Pecos River.