Russianred
Snail Spools You!
It looks like there is a space to screw in a 'pin' or 'plug' (probably with an allen/hex key) just enough so it creates that D shape from the O shape, depending on diameter of the knob pins sticking out, making them semi-universal for a few applications. See the holes on the sides? Then when the depth of the plug is adjusted as needed, they just slip on. This would be my theory.
Awesome and VERY RARE knobs.. Someone grab them QUICK!
Awesome and VERY RARE knobs.. Someone grab them QUICK!
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