They were not built by Browning. They are Rizzini barreled actions that were finished by Bertuzzi. I used to own #99 which was originally Frank Kodl's gun. He was aquainted with Chuck Yeager. They never did build the 100 guns. You could pick whatever serial number you wanted and if available, you got it! They were sold by the U.S. Historical Society. They have gold filled engraving of Yeager and his various planes, incl. the X-2 that he used to break the sound barrier. They were 28" choke tubed guns and a decent field gun. There are several on the market, incl. my old gun #99, by various dealers. They are WAY overpriced, because they think they are true Bertuzzi's. They are NOT!! They came cased with a copy of Yeagers autobiography. Hope this helps!!