This is an original WWII leather liner strap. It features United Carr stamped blackened brass rivets. The leather has conformed to the shape of a helmet's brim, but is still soft and supple. The reverse of the well-worn brass buckle exhibits the rare patent number of 2363872, dating the strap's production to November 28, 1944. This would be an ideal strap for a high-pressure helmet liner with blackened brass A-washers.
WWII Leather Liner Strap With Black Brass Buckle