This is an aluminum buckle European made reproductions of a German WWII helmet chinstraps that is marked "R. LARSEN BERLIN 1939".  On top of that it has been artificially aged to give it that lived in look. It is only $5.50 to ship this chinstrap anywhere in the US, Canada, Australia. NZ. and most of Asia and $5.00 within the EU. I take PAYPAL, other payment options are also available, just ask and I will see what I can do.