Thanks John. I've never seen those panels in polished SS or chrome, so I wasn't sure what I was looking at. I even thought they might be some sort of smoked acrylic lenses of some sort. Imagination is a wonderful thing when you are bored.
Yep that is typical. Look at the rubber gasket that goes around the panel. It is plain black rubber where the upper one and the one of the other Seagrave have a chrome strip. That is what makes me think it was a retrofit for who know what reason.