This model features the 2nd Maus prototype, known as V-2, fitted with a full turret. In this condition the one completed prototype Maus may have been used in the defence of the proving grounds at Kummersdorf.

The Panzerkampfwagen VIII Maus (Sd.Kfz 205) is the heaviest tank with completed working prototypes built during World War II. The basic design known as the VK70001/Porsche Type 2005 was suggested by Ferdinand Porsche to Adolf Hitler in June of 1942, who subsequently approved it. The design up to then had been the culmination of work done by Porsche who had won the contract for the heavy tank that March. Work on the design began in earnest and the first prototype would be ready in 1943 and was initially received the name Mammut (Mammoth). This was reportedly changed to Maeuschen (Mousy) in December of 1942 and finally Maus (Mouse) in February of 1943.

Most of the life of the working Maus prototypes was in testing around Kummersdorf and at the proving grounds in Böblingen. One Maus survives in the Museum of Armored Forces in Kubinka (near Moscow), believed to have been assembled from captured parts of several tanks.