Comparing: G.W. Tiger vs. Bat.-Châtillon 155 55

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.

A 155-mm SPG design project developed in 1955. The vehicle was intended to be manufactured on the chassis of the U.S. M47 medium tank, which was exported to France. However, the chassis of the French medium tank Batignolles-Châtillon 25 t was preferred over other variants. The initial version existed only in blueprints.