Vintage fur hat from Marshall Fields department store Chicago

One of my favorites however I'm doing some closet cleaning. This is a beautiful vintage fur hat from Marshall Fields in Chicago on State Street. I believe it is some real fur but I do not know specifically. I'm not sure on the age but it's definitely older. the size is small. the person who wears this hat must have a smaller head size. It's brown in color. as this is an older vintage hat, it is worn in some spots as to be expected of an item of this age.