Odometer knob, now I know.

[swooshdave]

Now I know why they are often missing. I bought a replacement a while ago but never got around to actually putting it on. I just did and it’s like a Rolex piece. And reverse thread. Turn it the wrong way and it’s loose and from there it’s not going to stay long in this world. I did use locktite but I’m more tempted to use superglue. 

[Twin AH]

I just used a bit of silicone on mine.......... seems to be just fine now.

 

Ciao