I wanted to share my experience with the group with the hopes of saving members time, money, and spare you from unnecessary frustration. I have been to hell and back with trying to find good quality date coded glass. After being ripped off and wasting a lot of time and money, I have learned that you can get American made repop glass from Pilkington Classic, but you have to specifically ask for it. They get their American made glass from Auto Temp Inc (ATI) in Ohio (DOT 509). The glass is excellent and doesnít have waves and excessive tempering marks. It is worth the money. The date coding is great too. However, if you donít specifically ask for it you can get some overseas glass from them. They sometimes get overseas glass when ATI is on back order.
Most overseas glass is wavy and has severe tempering marks. This is what is sold by many of the other vendors (DOT 516). In all honesty, if you are not building a concourse car or a nut and bolt restoration, the overseas stuff will probably be just fine, but if you are looking for excellent glass that is close to original- stick with Pilkington Classic and specifically ask for Auto Temp Inc Glass (ATI) (DOT 509).