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Up for sale track link from British WWII heavy tank - MK IV Churchill. 

MK IV were the most armored British tank during WWII, some variations used to have till 150mm thick armor.

Some of Churchills were supplied by Land Lease program to Eastern front battlefields.

Of course to run this tank strong and wide tracks needed.   Check this ground dug fround relic track link. 

The metal is quite strong , no damage, most probably spare track link totally unused condition.  Check the pics.