Useless/interesting point?

[glennr]

As I was working on the duchess today I was looking at the side window and I remembered something from years ago. Where the word TOUGHENED is embossed there is a small dot under the letter U. This denotes 1973, no dot denotes 1970, T is 71, O is 72, This should be the same for 1950's,1960's ie a 1969 car should have a dot under the letter D. Mindless, useless info I know but I wonder if it is true?
I can see you all rushing out to your cars to check!!! ;)GlennR

[Deleted]

It is true - but of course it may not be the original screen.

I am not aware of the code for the laminated screens though