Object 252 Improved, ‘Object 252U’

The Object 252U was an attempt by Factory #100 to improve the protection of the failed IS-6, which had fallen short of expectations.

Tracteur FCM F4

The FCM F4 was a heavy or 'breakthrough tank' designed in 1937 by the french company FCM. It was just a design, and never left blueprints.

AMX 37 ‘Char de Rupture’

The AMX-37 'Char de Rupture' was a heavy or 'breakthrough tank' designed in 1937 by AMX. It was just a design, and never left blueprints.