As funny as it sounds I'm not sure if this is glass or plastic, but I believe it is original. Though now that I see it in the light I don't think it is tinted. (Looking through the center everything is *slightly* darker, but I don't think that is tint).
It feels like glass until you plex it somewhat. (I assume it is plex-glass).
And now that I have it off the machine it does have imperfections. (Most below the control panel level).
I'm now considering making this a color matching/repair project.