C2 66 Winshield markings question

[Rich G.]

I have a 66 with what I thought was the original shaded windshield. It has all the right markings according to the TM/JG. There is another marking on the pass side about 1/3 down from the top and 1 inch from the side that is "A(down arrow)SI". It is readable from the inside of the car. It is between the glass, not etched on the surface and it is much more legible than the "LOF" logo. My 68, which I know has original glass does not have this mark.

What is this an indication of???
Thanks,
Rich Giannotti

[Rich G.]

I meant "winDshield" *NM*

[Zachary K.]

Re: C2 66 Winshield markings question

This code is a system set up to grade automotive window glass. The "AS" stands for "American Standards". The number "1" represents the glass as being acceptable for windshield glass or glass used anywhere throughout the vehicle. "AS2" is acceptable glass EXCEPT for windshields. You will also find glass rated from AS3 to AS10. AS3 to AS5 can be found in bus windows and travel trailers. AS6, AS7, AS8 are actually the windows in the rear of convertable tops or windscreens for motorcycles. AS10 is bullet resistive glass.

Your windshield is correct for having this and you should also find it on your '68, basically in the same area. My '70's AS1 rating is so faint that you have to hold a colored piece of paper behind it and you have to find the right angle for light to hit it to be viewed.

I think this standard came about somewhere in the 50's. If you would like a copy of the complete code, notify me and I will send you a copy.

[Rich G.]

Re: C2 66 Winshield markings question

Zachary

Thanks very much for that info. Now I remember I just saw a report on TV about AS1 vs AS2 glass, but it did not stick to my brain at the time. Thanks again. I will look harder at the 68 for the mark.

Rich Giannotti

[Rich G.]

More on this

I just looked at another 66, a 65, a 69 and my 66 and 68. It appears cars with shaded windshields have the mark I described in my first post. Cars without shaded windshield don't. They ALL have the AS1 mark near the LOF logo, but shaded ones have another mark just below the shading on the pass side with an arrow pointing down.

Does this mean they are only AS1 from there down??

Rich Giannotti

[Zachary K.]

Re: More on this

Not sure just what the arrow means although I have seen it many times. The AS1 determines that the windshield is laminated and can withstand pressures applied to it to protect the people behind it. If you were to find an AS2, 3, 4, 5, 6, 7, or8 as a front window I sure wouldn't want to drive down the road in that vehicle.

Again the codes were set up so that human protection is afforded. You will notice on your side windows that the codes will be AS2. This is tempered glass but not laminated as the front windshield is. The front windshield being laminated is actually two pieces of glass when broken it should not break into dozens of small pieces (looking like a pile of diamonds) where the side glass when broken shatters and splinters. The code you will find on the convertable rear window will be AS6 and designates that it is plastic and not glass.

Again, all automotive glass MUST carry this code set up by American Standards, it is a safety code set up in May of 1950. I can send you this information if you are interested.

[Zachary K.]

Re: More on this

Would just like to add that the vent windows and rear glass in coupes should also carry the AS2 code.

[Rich G.]

Re: More on this

Zachary

Thanks very much for that information. I do now understand the coding and the reasons for it. I'm still curious why shaded windshields have that mark and clear ones do not, but I'll chalk it up to one of life's mysteries.

Thanks for taking the time to share your knowledge.

Rich Giannotti Member 38954

[Chris H.]

Re: More on this

That mark is on all cars with the shading to show how far down the shading can come. It is against US specs to have a shaded windshield and OEMS use the mark to assure that the glass plant does not go to far down. My only caveat is that 1/3 down the glass seems a long way. On my Montana it is less than 1/4 down. Location probably has to do with sight angle of driver.

Chris

[Rich G.]

Re: More on this

Chris

Thanks, that makes sense. My estimate of 1/3 may be off. I did not measure. Probably more like between 1/3 and 1/4. I thought it might have to do with the clearity of the glass, so I guess it does, in some way.

Thanks for the information.

Rich Giannotti