The Russian T-35, the Worlds first heavy tank to be mass produced. It’s also the one only remaining in the world and its in working condition. I’ve been send this video where it was driven in a festival in Russia. Some evidence points (recent historians don’t agree with this) that this tank was based in the British A1E1 Independent and to be honest they are very similar. Further evidence to that supports this is the fact that the Russians tried to buy the A1E1 Independent but failed. Never the less, it’s impressive to see a tank 75+ yeras old driving around. Enjoy.