If orignal glass, I'd say you were right. . . . does that include the brackets that hold them in also ???
I think mine had been replaced, that I removed, and they looked awfully thin, like a cheap replacement glass. So I'd say the originals would be over 10 lbs.
Also, I might add to this post. . .. . . ... . . Removed cigarette lighter. . . . . . .. Replaced it with a "Book of Matches". . ... . .
Later Dude,
Stivan