Oh heck, I don't know. How about the HV helmet? That would stand for "Hasbro Video?"
I think it is a ROTJ hero helmet. I think. Others will have to chime in on that though. The dome sits a little off center in some of the shots and the lighting is a little funky from time to time but I think they would have grabbed the best they could find in the archives. I knew the guy who dressed Prowse for this project.
If you do get a casting it might be interesting to see the top of the face piece for evidence of the connector involved. Could tell us/ me something. Maybe not too.
Here is a video of the game footage that someone posted on utube
https://www.youtube.com/watch?v=VliKrIgerFw