|Engine Power (hp)||440|
|Speed Limit (km/h)||20|
|Standard Shell Penetration (mm)||128 - 213|
|Standard Shell Damage||169 - 281|
|Rate of Fire (rounds/min)||10.5|
Early prototype of a heavy tank designed for breaking through fortifications of the German Siegfried Line. Existed only in blueprints, prepared under the program for developing heavy vehicles that was initiated in September 1943.