Rogers flipdial
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Its not a set screw type – I just pulled the knobs off mine – If yours are stuck – there are two methods that I would try – first – a sharp rap on the middle of the knob inward – toward the back of the radio – this may break whatever corrosion is holding it on – not too hard – you don’t want to break the knob – and be very careful of the dial glass.
Next – take some strong string or butcher cord – wrap it around the back of the knob – and pull toward you with the free ends.
Removing the chassis screws and pushing the chassis toward the front of the cabinet may gain you a little more room to get the string behind the knob.
Good luck.