This tank paper model is a Neubaufahrzeug type B, created by [unknown]. The scale is in 1:50. The German Neubaufahrzeug series of tank prototypes were a first attempt to create a heavy tank for the Wehrmacht after Adolf Hitler had come to power. Multi-turreted, heavy and slow, they were not considered successful therefore only five were made. These were primarily used for propaganda purposes, though three took part in the Battle of Norway in 1940.
You can download this paper model template here: WWII Neubaufahrzeug Tank Free Paper Model Download [DropBox]