Two days ago the XBox One Store had a sale and a mysterious Premium Captured KV-1 showed up for sale. Problem was: it was a mistake. Wargaming seems to have released the tank by mistake and it was available for about an hour, meaning some players were able to get their hands on it and now have an exclusive tank in their garage.
From what I’ve read this tank is actually able to train both German and Russian crews,
which would be the first one to ever do this. The only tank that can do this is a T-34-88, rare tank already in the game. (Thanks to Robert for the update) . There are a couple of captured tanks in the PC version, like the SU-85i and SU-76i, but they don’t allow players to train both German and Russian crews. Maybe we will have this in the future?