Typically the manufactured date is on the drivers door jam. This is usally not the model year, as most cars are made the year befor the model year. So if your car says it was made in 06/92 it is a 93 model.
The year on the window is the year of the window . I have 1989 and 1993 on my windows (car's had a hard life). However, if it was the original window then it's probably the year of the car.
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