Need Help With A 1932 Ford Part

[34FordFabricator]

I ran across a original 1932 Ford dash light switch. It had just the remnants of the plastic knob which just fell off shortly after I got it. A metal sleeve remained on the switch which I assumed would thread off. But it will not. I tried to clamp the lower part of the shaft between 2 pieces of aluminum so as not to mar it and then unthread the sleeve but it would not budge. Can anyone help as to how it can be removed. The shaft is threaded is it not. Thanks for your help.
Bill