Found this on the Net:
https://carpart.com.au/blog/understanding-the-codes-on-your-cars-glass-windowsHow Do You Read a Windshield Code?
First of all, it’s important to note that there is no standardised pattern of displaying the entire windscreen glass code. So, you’ll notice some differences in the windshield monogram of two different cars.
Still, the following pieces of info imbedded in the code are almost universally used and presented among auto glass manufacturers. Here’s how you read them:
Car Manufacturer: Right at the top, you should see the car manufacturer’s logo and name. Bear in mind that this is the logo for the car that the windshield is attached to, not necessarily the glass itself.
Glass Manufacturer: Besides the car manufacturer, the code will also display the glass manufacturer’s name and logo. This is the company that supplies the windshield to the carmaker to use in the assembly process.
Glass Brand Name: Windshield manufacturers may have unique brand names for that particular range of windshields. If they do, they’ll usually print the brand name as well.
AS number: This stands for “American Standard”. The number that comes after “AS” will indicate the exact level of quality by American standards.
M Number: Besides a glass brand name, the code should also include the M number or model number. That number is not universal, as each glass manufacturer might have its own M number.
DOT Code: Even on some cars in Australia, you'll find American codes like these on the windshield. The DOT code is the Department of Transportation code, a requirement for windscreens used in the US.
E Code: The E code indicates in which country the windscreen was certified as assigned by the United Nations Economic Commission of Europe. If it was certified in Australia, the code would be E45.
Production Date: Some windshield codes will include the production date, i.e. the month and year when the glass was manufactured.
