This is a highly collectible piece of WWII military aviation history: an original U.S. Navy Bureau of Aeronautics Gosport-style leather flying helmet. 

This specific pattern was primarily issued to Naval Aviation Cadets undergoing flight training during the early stages of World War II before communication systems transitioned to electronics.

Design Features:

• Gosport Setup: Built-in hard leather acoustic ear cups designed with receiver ports to connect directly to flexible voice tubes.
• Premium Construction: Rich dark brown leather shell with heavy-duty stitching.
• Hardware: Features the correct dual adjustable metal chin strap buckles.