Unbelievable find while cleaning out a friend's estate.  He collected all things Navy.  I believe it is an original U S NAVY AERONAUTIC STATION  flat hat.  The U S NAVY AERONAUTIC STATION existed from Jan 1914 to Dec 7 1917.  Inside the cap is the sailor's name.  Please see the pictures for condition and details.  Email with questions and thanks for looking.  ALL GAVE SOME....SOME GAVE ALL....THANK A VET FOR YOUR FREEDOMS.....