Big Ben

 is a Tier 5 Tank that upgrades from Exponentiator and Clockwork at level 60.

Design
The probably had a similar front barrel to Exponentiator. It lost its rear swarmer though, it having been replaced with a Clockwork gear that spawns bees.

Technical
Like other Exponentiators, the inherited traits from and fired a particular Cruiser branch. In 's case, it fired small Clockworks as missiles.

Trivia

 * This tank is named after the Great Clock of Westminster in Britain.