Early 1900's CORBIN BRAKE white celluloid 7/8" pinback w/paper Bike Bicycling The product is a vintage CORBIN BRAKE white celluloid pinback from the early 1900s, measuring 7/8 inch. The pin features a paper insert with a bike or bicycling theme, making it suitable for collectors interested in advertising memorabilia. This United States-made collectible is a unique piece of history that would make a great addition to any pinback or vintage memorabilia collection.