This shows that the original glass is earlier than the factory date, not only marked with the logo of the car brand, but also with the logo of the glass brand. Due to some policies and regulations of automobile manufacturers, supporting manufacturers in the market prohibit the use of automobile brand trademarks. Therefore, most of the glasses replaced only have the glass brand logo, and there is no car brand logo.

Because the different glasses of a car can't be exactly the same, it has nothing to do with the car itself. However, if the glass has quality problems, the inconsistent production date can be used as effective evidence of glass quality.

Extended data:

1. The windshield was a whim of Ford in the 1920s. Sandwich-like glass is made by clamping two pieces of glass together and separating them with a layer of PVC plastic. This technology is still in use.

2. The window is an important part of the whole car body, which is designed to meet the needs of lighting, ventilation and vision of the drivers and passengers in the car.

Windows are installed in different positions according to the glass: front and rear windshields, side windows and doors and windows. The modeling structure and quality of the window have great influence on the driver's vision, passenger's comfort, aesthetics and aerodynamic characteristics. The window structure is usually arc-closed, and the window frame of the car body is connected with the window glass through rubber sealing strips. The sealing strip plays the role of sealing and buffering to prevent the windshield from being damaged when the window frame is deformed by the force of the car body.