This vintage hat was made by Churchill in the 1960s.  From my 12 years of dealing vintage hats, I can safely say that this is a pure beaver dressweight Churchill, likely their One Hundred model, which sold for $100 when new.  The felt has a better hand than the Stetson 100 I am currently selling.  Unfortunately, unlike Stetson, Churchill only marked their felt designations on these high priced models on the sweatband, so when that was replaced by Rand's Custom Hatters in 2002, the designation was lost.