On my car, the window is part of the clock. In order to separate the window I would have to crack some plastic. I disconnected the electrical to my clock long ago because it sits at a very poor angle. In order to read it, I would have to lean way forward in my seat. I have considered replacing the clock with a black piece of plastic that could hold some switches and LEDs. It would be a nice way to modify the car without causing irreversible damage. A flat piece of plastic should work fine; although, it won't fit flush like the clock face would. I suggest that you keep your original clock unmodified unless a warehouse somewhere has 100's of them. Does anyone know if this clock was used on other cars? Surely it was. Walt Tampa, FL