I don’t know the manufacturer of my seats, but they are early compact car. They are old enough that they have never had a headrest. I’m guessing that they might be early Pinto. I also don’t have the seat box base, they set right on the floor. Quite comfortable, have taken several 100-200 mile trips without butt pain. They sit as far back as they can, and are fine for me, but I’m short. The thickness of the back is therefore important for you long and lanky types!