In case you guys did not know about the No. x rating. It stands for the percentage of beaver that is mixed example 7 X means it is 70% 4 X is 40 % beaver pelt mixed with other fur, chiefly rabbit fur. And it also stands for how tight the weave is and or compressed. The 10 X is 100% beaver pelt. All of those that are over the 10 X example: like 20 X those are beaver pelt and chinchilla pelt. Those hats run in excess of 5000. U.S. I use to have more than 40 different cowboy hats of differing styles and periods. But I would dress them out like along the pencil curl of the brim or base of the crown, add either plain leather, beaded leather, satin or gold bullion and even hammered silver. When I wore them out to places someone would be wowed over by the dressing out on them and they would come by my studio and I would let them pick out one of mine to purchase. It was also how I got people interested in seeing and purchasing my artwork also. My most valuable hat was a Mexican Sombrero from circa 1890....it was covered in gold bullion. Most of my hats and a ton of other stuff was destroyed when my studio burned back in 1996.Here are a couple of my cowboy hats AussieMeister! . The top one was my father's, Bradford custom made 7XXXXXXX Beaver, the other is a Resistol 7XXXXXXX Beaver, Black one is Stetson 4 XXXX Beaver and the Aussi slouch is a FARYEFIELD of Melbourne 1968. I used to wear hats a lot....I rarely wear them anymore.