914 Windshield inside OEM Glass Sticker logo?, Anyone making these OEM Windshield Mfg. Stickers Options

[TJB/914]

Looking for help if anyone makes these OEM Windshield Sticker's?
Are they different for every model year?
Many years ago while restoring my 914 I used a solvent to clean up the windshield glass & destroyed the letters. I would like one for my OEM original windshield (IMG:style_emoticons/default/pray.gif)
This is off as recent 1976 in a local shop for repairs in this photo.
Tom Michigan

[vitamin914]

I was a tooling engineer at PPG in the late 80s. Those marking are required by law on any safety glass, laminated or tempered, used in vehicles. FMVSS 205 is the standard for US vehicles. Europe has slightly different requirements.

The trademark gives the manufacturer (DOT registration number), the factory (if they had more than one), the date of manufacture (month and year) and the composition of the glass (M number - referencing glass, thickness, color, laminated or tempered). The AS marking gives its intended vision area AS1, AS2, AS3 etc. They must be permanent markings so they cannot be removed by cleaning.

The trademarks are applied by sandblasting if the glass is already bent, fired-on ceramic stamping, or fired-on ceramic silk screening (especially if the glass has a black paint band or a heated circuit).

Every manufactures codes vary including the date code. For PPG (now PGW) the year was in the text and the month was the addition of the numbers 1 2 4 8. By blocking out the appropriate number on the silk screen you could come up with the correct month. Block out the 1 and the 4 leaving 2 and 8, would give 10 for October. Sometimes they would cheat to save making a new silk screen in January (since the year code would need to be changed) and make the numbers add up to 13. Other manufacturers use letter codes. It isn't intended to be a precise date down to the day.

Sometimes auto companies add stuff (bar code data) for robots to identify the glass prior to installation. They also can add logos or certifications for various countries.

Some useless trivia...