Comparing: G.W. Tiger vs. G.W. E 100

Development of an SPG on the chassis of the Pz.Kpfw. VIB Tiger II started in 1942. The project called for designing a common self-propelled gun carriage for the 17 cm Kanone 72 gun and 21 cm Mörser 18/1 howitzer. The concept of the SPG allowed the use of artillery systems from both the carriage and the ground. Work on building an experimental prototype began in 1945.

Development of this heavy SPG on the E 100 chassis started at the end of 1943, but it was never completed. No prototypes were ever manufactured and the vehicle did not undergo any trials.