I’ve been collecting these shift knobs over the years because who doesn’t like metal flake right! An old timer told me the blue one was the same one used on the Orbitron. I don’t know if it’s true but if anyone has pictures of other colored shift knobs or advertisements I’d love to see them!
All kind's of them;https://www.jalopyjournal.com/forum/threads/how-about-a-shift-knob-thread.1211107/
I found this green one at a junkyard this summer. Didn't know it was a Cal-Custom thing but that makes sense.