[Nathan Slingerland]

That's great info Ron. I was so focused on the knob appearance I didn't give any thought to how they would be attached.

Of course as usual my 37-690 is 'a bit different'.

I tried unscrewing the white knobs to see what threads were there - and the answer is: none. They're just held on by friction in a 3/8" hole.

   

They back of the door isn't affected - the original captive screws have been removed somehow. Kind of impressive actually - the door is otherwise intact.

I guess in a sense this is good news for attaching the knobs - I could use wood-working epoxy to embed machine screws of the required size.