I think it's for a 1947 Ford. I would like to remove just the plastic knob so I can unscrew it from the mounting plate. I don't want to experiment and break something. Thanks.
I believe the knob just pulls straight off, there is a small groove in the metal shaft that aligns the knob so that it can be put back on the same position for the different speeds , also should be a small bulb in the metal shaft. my experience was this on mine .. the other hole in the mounting plate if for the Defrost pull sw.
Just a tip, any of these push on type knobs etc. I have removed, I lightly coated the mating surfaces with Di-electric grease before reassembly. (makes any future removal easier)