This is a custom tank based on the Solido Panther. It is meant to depict an upgunned E-50 50 ton tank that was envisioned for the WWII German "Entwicklung" standardized tank development plan. This tank would have replaced the Panther and may have used the Schmalturm type narrow turret and a simplified suspension system. Just for fun, this build also has the FG1250 Sperber active infrared night vision system for the commander/gunner/driver. The scopes are magnetically attached and can be removed.
Again, this is a fictional "paper panzer" that never made it out of the concept stage, but it is still of interest to alternate history buffs and online tank gamers. The vehicle features realistic markings tying to it to 12th SS Panzer Hitlerjugend.