Thx John. So your side glass is the exact same as my 76er.
It’s Duro-Glas brand, licensed from Saint-Gobain Sekurit, manufactured for BMW byVereinigte Glaswerke (VEGLA) of Porz, Federal Republic of Germany (DOT28).
Their M101 mfg type code, ending in 1 indicates green tint. AS2 indicates this glass is tempered and has at least 70% light transmission but it doesn't pass all the impact tests like AS1, which is required for laminated glass windshields.
If your windshield is also original I’d like to see that bug, to see if it had the BMW logo (the rears all didn’t AFAICT), and if the mfgr was also VEGLA…
Tom