For what it's worth, these are the date codes of my 1968 04A Norwood-built Sport Coupe. It is a survivor, I'm the second owner and have owned it since 1988:
Windshield CZ Nov 67, Back glass LX Mar 68, Driver's door XX Feb 68, Drivers quarter LX Mar 68, Passenger door LX Mar 68, Passenger quarter LX Mar 68. None of the four side windows are marked with Astro Ventilation.