Please be as specific as possible when letting us know what is missing or incorrect. For example, say "this game's trophy difficulty should be 8/10", with a link to a website corroborating this difficulty estimate (if possible), not "this game's trophy difficulty is wrong".
Challenger Mk.3 (Rank 7, Great Britain); 2000 Golden Eagles; 15 days of premium account.
All premium vehicles allow you to earn increased Research Points and Silver Lions and comes furnished with all available modifications.
With a Premium account (also purchasable in the game for Golden Eagles) you will earn more Research Points and Silver Lions in battles for a set amount of days. This is cumulative with bonuses from premium vehicles!