The middle band of knob 207 made it too hard to grip:
So it has been recut to a profile that is easier to grip:
Knob 213 ( below left) is a wide knob, suitable for a rotary switch, with several finger-grip rings around the top. Knob 214 (below right) has a more angular profile, with a smaller top and a yellow glass beat pointer. Both are solid woven strand Eucalyptus, with a generic superglue primer and Kiwi neutral shoe polish finish. Again, getting the evident iridescence requires a high polish on the bare wood before finishing; followed by more fine polishing.
Knobs 213 & 214