http://www.ebay.com/itm/401054856848

This is a rare John B. Stetson Boss of the Plains, made in their No. 1 quality fur felt.  Known as the “hat that won the west”, this was a real working cowboy’s style, with a flat, raw edge brim and a short, straight sided crown. This is a relatively late production example of the model, which can be dated between 1933 and 1935 by the NRA Code tag. The brim measures 3-1/16″ and the crown measures 4-3/8″.