I have two (2) Thornton/Olds repros w/numbers. Very slightly larger diameter than Buick (¼" maybe) & not shiny. The one(s) for sale is pictured on the left. On the right is one for a Buick for comparison. I installed one of them & drove the car a couple times and didn't even notice the size difference until I went to shift the 1st time being used to the smaller one in my other cars & replaced it with one of @copperheadgs1's repros. I actually liked the way the larger one feels & exc. for not being correct would use it so if you're not as particular... $17.50 ea. Shipped ($30/both) - Contiguous lower 48. $10 ea. delivered to the Nationals. Same thread as a Buick shift handle. No jamb nuts. PayPal (f&f) sdjs1971@yahoo.com. PM your shipping address to me on here please or for Zelle, Venmo, or my address if sending check/MO.