Here is a vintage catalogue listing for ostrich plumes. The plumes were sold in a variety of colors and sizes, ranging in price from 33 cents to $1.85 each. The ad is from a 1907 Sears, Roebuck & Co. Catalogue in my collection. 
Here is a black and white clip art image of the ostrich plume from the ad. 
Click on images to enlarge.
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Julie is a vintage enthusiast and a Photoshop addict who collects old books and new recipes.
Contact her at: theolddesignshop(at) gmail(dot)com
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