Shows alot of use, but is still pretty soft and pliable. I believe the buckle is aluminum.
Check out my other auctions for the matching helmet liner it came back from the war with! The item "Original German WWII WW2 Helmet Stahlhelm Leather Chinstrap Dated 1941" is in sale since Saturday, October 17, 2020. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Germany\Hats & Helmets".
The seller is "glock_addiction" and is located in North Prairie, Wisconsin. This item can be shipped worldwide.