Credit to Xergoyf for fixing the History 3 sale at 16 keys

History 1: https://backpack.tf/item/1964056865

Quicksell.store transactions

History 2: https://backpack.tf/item/1527113896

Deposited to marketplace.tf, last seen on August 21 2020

History 3: https://backpack.tf/item/1373780674

13 keys 25 ref pure (13.53 keys) ~14 keys:

https://backpack.tf/profiles/76561198021474524#!/compare/1599264000/1599609600

https://backpack.tf/profiles/76561198183784235#!/compare/1599350400/1599436800

16 keys pure, , 1 key was sold for ref the same day. Counting keys on the buyers side confirms this, as 16 have matching histories

https://backpack.tf/profiles/76561198183784235#!/compare/1599436800/1599523200

https://backpack.tf/profiles/76561198090657541#!/compare/1599523200/1599609600

Untrace:

https://backpack.tf/profiles/76561198090657541#!/compare/1599609600/1599609600

https://backpack.tf/profiles/76561198053532761#!/compare/1599609600/1599696000

Marketplace.tf sale: https://marketplace.tf/items/tf2/921;5;u33

(UNTRACEABLE) July 27 2020: $23 (key=$1.92, 11.98 keys) ~12 keys

We have 12, 14 and 16

Excluding 12 because of multiple buyers at 13.35-13.38 keys

Going with 14-16 keys