RARE Vintage Men's Dark Brown Brock Porkpie Fedora Hat Size 7 1/8

The exterior of the hat is clean and in excellent condition. There appears to have been a protector over the inner crown of the hat that has disintegrated. Remnants can still be seen around the interior rim. There are some sweat stains on the hat's interior. I am unsure of the exterior material. Comes from a smoke-free home. Measurements: Exterior: Total: 11" wide x 12" long Crown height: 4" Brim width: 2" Interior: Opening: 6.25" wide x 7.75" long Opening circumference: 21.5"