American Indians in Advertising

Native Americans in Early 20th-Century Advertising
One thing that interests me about early 20th-century advertising in the U.S. is how ideas and imagery of Native Americans are used to inscribe authenticity and legitimacy in products. Take this 1915 ad for Seneca cameras I found at an antique store:

When Seneca meets Seneca
This Seneca Indian Chief, Wy-ten-ac (Quick Eye), with his years of training, cannot get as accurate an impression of the things he sees as can any Boy Scout with the Seneca Scout Camera.