Der letzte Kampf.

1:1, as far as I know.

Unboxer gave it for free to a friend: https://imgur.com/a/IYTPJEO

Bought for 43 keys pure on the 19th of November, sale is still in-date. No compare: item history doesn't show the friend of the unboxer Heavyweaponsguy got the hat from: https://next.backpack.tf/item/12231034930

Proof from buyer: https://imgur.com/a/IFW8XPR

Proof from seller: https://imgur.com/a/rac82cK

Bought for 60 keys pure today. Proof: https://imgur.com/a/7LvvslL

Thanks to Vege for helping me making the suggestion.