Vintage WWII Navy Nurse Corps (NNC) hat. The covers on the hat are interchangeable and this hat has the white cover, black cover and rain cover. Size 21 1/2. Nice U.S. Navy Nurse's Uniform label on the sweatband. The hat and covers have some wear and staining (see photos; no attempt has been made to clean it). The back hole on the hat and cover don't quite line up.