WWII US Navy V-5 Aviation Cadet Garrison Hat.  No size tag, but looks to be around a size 7 and in great condition.  This came from the estate of WWII US Navy pilot LTJG Oswald Herman Nesvold.  He flew PBM-5 Mariners during the war.  I have several of his items that I will be listing over the next few days.  (BB5)