Obtained in a scrap.tf auction for 43 keys and 24 ref, but to round up, 43 keys pure

https://scrap.tf/auctions/O9QZ5U

Checking a second history, the item jumps from one backpack to another but the compared history doesnt show any exchange of the unusual being obtained but it does show a removal of keys and metal on the history dates:

https://backpack.tf/item/16102402576 (history)

https://backpack.tf/profiles/76561198882886230#!/compare/1756771200/1756857600 (keys being removed matching history dates)

On this one, 32 keys as a round up not counting metal.

Bots like gladiator.tf offering 14 keys as buy listing