tie pilot helmet

Recently a good friend of mine sold me an ANH Tie Pilot Helmet he's been keeping in his basement for the last 5 years. He can't remember who sold it to him, but he says it was on the RPF. The Faceplate, he says, is a lineage face plate. I wanted to verify this and get ya'lls take on it.. I trust...

They're all cast from original props (correct?), but each have subtle differences (I'm not referring to craftsmanship, etc., just visual accuracy). Some photos of the SDS helmets make the pilot look a little wider than RS and CFO. Whereas the RS helmets, the frown looks a little "toothy,"...