This is an amazing find.
This hat is in amazing condition for age.
It will need to be cleaned and steamed to get to its optimal style and condition.
It is wool and possibly Beaver and has no obvious moth bites, only discoloration is inside satin and its not bad for age.
This was sold at The Crescent Shop in Spokane which was a specialty shop since late 1880's based in Spokane but a subsidiary of Marshall Fields. It was designed by Moveo Et Proficio which I think was designed by one of the Knox brothers. ( Knox of NY hats)
It doesn't have a size so I measured the best I could the inner rim which was apx. So it is apx 21. 75 inches. Outside rim or crown is
23 3/8 inches and the brim is only apx 1. 75 inches which is why it dates to 30's.

This item is sold from an excellent, highly rated vintage boutique in Beautiful Eastern Wa.