The Stovebolt Site Forums The Shop Area Driveline 52 1/2 ton max drum diameter

Well, okay...here is an image of the brake drum I mentioned:
http://s1154.photobucket.com/user/JonGoodman/media/MVC-766F.jpg.html

And here is an image of the 1952 pickup from which that exact brake drum came:
http://s1154.photobucket.com/user/JonGoodman/media/truck%20March.jpg.html

One way to tell if unlabeled glass is safety laminated is to look at a reflection of your wristwatch at an angle in the glass. If you see two images close together...it is a very good likelihood you have laminated glass. You can occasionally see two images in a thick piece of tempered glass, but it isn't too common.

Hope this is helpful.
Jon