Just picked up one of these repro radios http://www.radiosforoldcars.com/newradio0F.htm
and have to say that the pointer drive is anything but quiet stepper motor precision, sounds more like a sewing machine!
Have made a youtube vid of it http://www.youtube.com/watch?v=Da6oYGFUyzs
When slowly rotating the tuner knob for manual tuning, the pointer moves up and down as well as in and out, in a circular motion as it traverses the dial i.e. it corkscrews it's way along the dial, which strongly suggests to me that the stepper lead screw is running out of center, causing the sewing machine noise.
Let me know what you think.