for future reference, here are the factory codes for glass:
1969-1973
G11 Tinted glass (all)
G12 Tinted glass (side glass only)
G15 tinted glass (windshield)
G18 Clear windshield
*******if the box on your build sheet is empty, all standard glass was used (quite rare)
1974
G11 Tinted glass (all)
G12 Tinted glass (side glass only)
G15 Tinted glass (windshield)
My AAR has the G15 code...only a tinted windshield, with clear side glass...I know this is an old post, but thought my reply would be helpful..