A Native American beaded war shirt from the Upper Missouri River is valued at $250,000-350,000.
It will lead a sale at Bonhams San Francisco on September 14.
It comes from the collection of French horse trainer Mario Luraschi and is one of 150 pieces in the sale.
Bonhams explains: "Luraschi has trained horses and coordinated stunts for television and films for decades, as well as developed numerous live shows.
"During time he spent filming in the United States, he frequented Santa Fe, New Mexico, and other centres for Native American art, turning his love for the Old West into a remarkable collection from which Bonhams is pleased to offer a selection of the very finest pieces."
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