The T-15 was an experimental German-Czechoslovakian light tank developed by Škoda Works for the German armed forces from 1941 to 1943. The T-15 never entered mass production or combat, and only no more than five prototypes - including two in mild steel - were built.
The T-15 weighed 11-13 tonnes, and was armed with a 37mm gun and MG34 machine gun.
Interest in the development of the tank declined in 1942 as the Panzer II Ausf. L "Luchs" was more advanced, however Skoda continued the development project.
References
Skoda T-15 Wikipedia(Text) CC BY-SA