ahh the fun of US car regulations
IIRC they demanded sealed beams for a long time, and really dragged their feat in terms of what a head light could and could not be (I remember seeing my first rectangular sealed beam, from a friends S10 pickup, that was funky LOL)
going by how you used to own a Pontiac Straight 8 did you spend time living in the states?
I understood it the first time around, thanks.
Cool , I just wanted to clear things up a bit, because you and Beep are both correct sort of (Beep could well have corroded sealed beams in his shed, and how your right that a working sealed beams reflector wont ever corrode)
im also trying to keep things amicable here by clearing things up and helping people understand things better
Call it corrosion, call it tarnishing, call it losing the initial reflectiive properties, the fact is that they degrade over time (note that others above have made the point that a new sealed beam meaning a new reflector is a good thing).
But what do I know; I've only been messing around with them for 25 or so years. Obviously my eyes deceive me, and I bow the the superior knowledge of all things automotive that you obviously posess.
I know that you find contradicting everything on here as some form of game but I, like Saabnut, find it pretty tedious.
I do think in this case Junkman may have been genuinely curious about them