That's interesting that and I always like to know new info. I have about 12 pair and they all seem to be the same height and took many from 33-34 Ford cars. No part numbers noted. Laid on a flat surface, they have a max overall height of approx 2 & 1/2 inches. Some even came with 35up pickup horn brackets attached. I think I have seen a few similar brackets at swap meets that are a little taller but were not IDed. Any info appreciated.