Update: Changed the title, too click-baity, sorry
WarGaming seems to be getting into the clothing industry lately. This offer is not so much a bonus, as it is a way to try to get you to spend a bunch of money, to help promote the game by buying an expensive jacket with WoT insignia on it. You get a free tank if you decide to do so though. And the jacket looks all right I guess.
Buy the 250€ jacket + at least one accompanying accessory (Ushanka, Commander Belt, Loader Bag, Ranking System) to receive the in-game Bonus Code for a free Panther 8,8 L/71 tank with 100% trained crew, a garage slot and 30 days of premium.
You also get 3 invite codes for your friends containing the T2 Light, Garage Slot, 7 Days of Premium and 500 gold