The Tank, Heavy Assault, A33 (Excelsior, tank, heavy, assault A33) - British experimental heavy tank of World War II Based on the earlier design Cromwell. Work on the Excelsior was conducted in case of failure of the program associated with the tank Mk IV Churchill Infantry. Polish Electric Company has built two prototypes, primarily based on the hull of a tank Cromwell, the first of these was the suspension of an American tank M6 Heavy Tank, the second modified suspension Cromwell. After the ent