NFL turns 100: A look back at how players equipment has evolved
Vintage Photos of the NFL That Show How Football Has Changed
I believe the date is 1964. Check out the photos for condition.
Vtg 1964 Wilson Etholite Green Bay Packers Glory Days Style Football Helmet
Max McGee: Untold Story of Packers Super Bowl hero - Sports Illustrated
Leatherhead to Radio-head: The Evolution of the Football Helmet, Arts & Culture
Helmets don't eliminate concussions. It's time for the NFL to ditch them, NFL
Whatever you do, don't put on the Old Leather Helmet
Early history of American football - Wikipedia
NFL At 100: From head to toe, players equipment has evolved
Football Helmet Stock Illustrations – 20,681 Football Helmet Stock Illustrations, Vectors & Clipart - Dreamstime
Late 1920's Executioner Style Leather Football Helmet. Football, Lot #81436