I worked at a Circuit City type place in 1991 and bought the world's smallest radar detector. This thing was seriously small. I had neveer seen anything like it before or since. It was about the size of 5 credit cards stacked together and I'm pretty sure it was a Uniden model. It was gray in color with a couple of tiny flip switches and led's.
I've done some googling but can't remember the model. Does anyone know?