The overall form looks like the Panther II proposal, though the mantlet here doesn't quite fit...
...Oh! I see. It's the Panther II proposal with Schmalturm turret.
It's either the f model or Panther II surely Maho would chose the panther II since other models have really really poor reverse speed but looks more f model since Panther II have night vision equipment on the turret and body
I think you're right. It's the Panther ausf. F with Schmalturm.
The schurzen means it was modeled after a production vehicle, meaning it wouldn't have been the Panther II prototype. The ausf. F was also a testbed for the Schmalturm turret, so there's also that going for it.