[1960HDGMC]

Here is the info on my VIN Plate:

1002 P N2493A

(w/ Frame dated 9-26-59)

As I understand, and correct me if I am wrong, each plant started production with number 1001, so that plants first truck would have a VIN of 1002 P N1001. By that logic, my truck is the 1492nd truck built at that plant. I guess there are VINs with the same number, with only the plant letter to differentiate them. I wonder if the different plants started production in unison, or if Pontiac, being the home team, may have started first.
As for the optional glass tint versus clear, I can not find a part number in the 1960 Master Parts Book, or the 1960 GMC Accessories booklet or tri-fold flyer. Seems like I thought there was an upgrade for windshields with the Custom Package, but I have not found it in print ,yet. If there was an upgrade available in 1960,would it have been Greenish for Deluxe and Shade Banded for Custom, or Clear for Deluxe and Green tint No Band for Custom. Where can I find print that eludes to the windshield upgrade for 1960 GMC?
My windshield has front bottom center, read from front of truck outside, GUARDIAN
SHADED
LAMINATED
AS-1 64
I assume it was made in 1964. I would say it is Green tint with Blue Band. It is butt ugly to me ,and then we cracked it, strike two, its out. Lets get it back to factory specs for a Custom 1002 . Thanks for all the help, Greg Mead