From the Estate of a retired GM Pontiac Engineering Manager. This is a NOS 1964 1965 and 1966 OEM Pontiac GTO Lemans Grand Prix Bonneville Radio Reverb # 7284893. It may fit other models and years, but this is what I understand is compatibility. It has never been installed or used. I am not able to check it electronically, but it does check out with a handheld meter. You can see the attachment points have never had a nut or screw on them. 

I was able to purchase his collection of brand-new parts he had saved from his employment tenure. Check out my other listing, as I am selling all the items purchased minus a couple I am keeping for my cars. 

Please look at all photos as they are part of the description and can say more than I can write. 

I am just a guy with a few parts for sale. If you have an issue, please contact me so we can work it out. I have been selling on eBay for many years and have a great rating. This is a hobby to feed my car addiction. Please look at all photos as they say more than I can write. You will only pay actual shipping, and I do not charge for boxing or handling.