Commanders, We will soon be updating the World of Tanks in-game store. As of January 16, 2012, the Type 59 premium tank will be removed from the in-game store after the server restart, which will take place at 6:00-6:30AM EST (11:00-11:30 UTC). While the tank will not be available for purchase, all existing Type 59 owners will keep their tank intact. This decision has been made to ensure a healthy gameplay balance at higher tiers, and also to encourage a wider variety of tier 8 medium tank usage. If the Type 59 becomes available for purchase again during special events in the future, we will be sure to provide ample notice. Again, the Type 59 will be removed from the in-game store on January 16, 2012 after the server downtime scheduled for 6:00-6:30AM EST (11:00-11:30 UTC). If you are considering purchasing the tank, we encourage you to do so before this point, as it will not be available for purchase as of January 16, 2012.
http:/ /worldoftanks.com/news/953-type-59-game-store-removal/