Development was started in 1936 by the Landsverk company. The new vehicle incorporated some elements of the L-60 light tank. In 1939, Hungary took an interest in the project. By the time the first prototype was produced in 1940, Hungary decided to develop their own medium tank on the basis of the Škoda Т-21. Later, some technical solutions were applied in the development of the Strv m/42 tank.
Time for the successive autoreloading of each shell into the magazine.
Characteristics are specified for Siege mode.
Characteristics are specified for Rapid mode.
Reload time of the first and second guns on double-barreled vehicles.
Characteristics are specified for vehicles with crews trained to 100%.