I concur with Scott81, it is a shifter reverse lockout button. Back in the 70s you could order after market wood shifter knobs and you could specify what type of cross flags emblem that you wanted on the lockout button.
Dimensions are 1" diameter by 5/8. It is to heavy to be a knob for a stereo. the hole is 1/4 and only goes in for three threads. I wanted a knew one to fabricate a shifter, is a real neat item but beyond me as to what it came off of.
Now that we have the dimensions, I concur with Scott81 and Vette81; it is a shift button for auto tranny. I have '71 AT with wooden handle and similar button...only difference is mine has a different crest.
My auto shifter is stock with black ball and chrome button. Did yours come stock with your car or is it an aftermarket part? Do you know where I can find a new one, all I have been able to find is the black handle with chrome button.
I concur w/ R&D...black knob w/ chrome button likely stock. I acquired quite used '71 w/ custom wooden knob & crested button in place. I've looked in several vendors' current catalogs today... all I find is black-chrome.
Perhaps you could make some calls... maybe vendors'll have older custom accessories "in the back"... ones that may be less popular with today's restorers. You may find auctions at www.ebaymotors.com a source.
BTW, my wooden knob is open-grain... it can get pretty grimy.
Wamp and R&D, do your '74's have an indicating needle or pointer that shows what gear is selected? My '71 does not.
I don't disagree w/ the split-bumper comment (lol)! I actually saw a :crazy "updated" Opel GT (baby chrome-bumpered C3 knock-off) using a '74 2-pc bmpr cvr... what a job... and for what?
It is definately a button for the shifter. Back in early 70's, you could preplace the button on shift quite easily with several different "buttons". Have not seen them for years any where. If nothing else, nice little collectable.