Drivers & passenger door glass, silly question??

[RodneyHZ253]

And another thing which I didnt know until a few years ago, is that you can get matching numbers glass.... Theres tiny dots above the lettering on the pilkington logo that denote the month and year the glass was made. One for the nerds really but who knew hey!?

I used this in the 80's when I purchased cars to try tell if they had been in a smash it was generally a good starting point
I thought it only denoted the year