Window Date Code Information Please

Here's the markings on my driver's window:



SAFE GUARD
SOLID TEMPERED
TINT * PPG
SAFETY GLASS
AS2 M27.726 32
DOT 18

I believe the 32 is March of 72, is that correct or is the date in the other #'s.
Thanks Ron

Take a look here ...
http://www.mmcdetroit.com/Date_Codes/date_codes_31_l.html

Thank you , it is as I believed then.
Ron