Why would the sellers use a small-time auction house? That will raise some doubt as to the authenticity of the docs.
I wonder if it was offered to major auctioneers in the Chicago area (i.e., L. Hindman Auctioneers) and rejected? BYW, L. Hindman has handled items from the Comiskey family, including selling actual pieces of Comiskey Park when it was dismantled — would that have been a natural choice?
Maybe there’s a provenance problem. I have no idea though.