Originally Posted by Woogeroo
Anyone have any idea what that mirror is out of? I'm just curious.
-W
Small consolation,at least it didn't take out your windshield. I've seen the inner glass lamination removed in such cases and cracking the glass.
The idea is the mirror is designed to break away in the event of an impact by your head etc during a collision to further lessen the chance of damage to you.

I've seen these style mirrors used on American,Japanese and European makes and models so it's hard to pinpoint an exact source.
The mirror boss (the metal attachment on the glass) however does look like the style used by GM (Europe) and no doubt GM (USA) for some years from the early 80s.

I'm also glad no-one was tempted to suggest super-glue,that stuff can actually crack the glass as it cures.
It generates huge amounts of heat.

1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.