Neal they are for the 1960-1966 suburbans, but there is a catch. They made two styles one for the GMC and one for the Chevrolet. I think you have the ones for the Chevrolet because of the way it mounts. I am trying to get this resolved in another post. I used your photos as an example, they look like what I have. The jump seat will fit in both the Chevrolet and the GMC, it's the middle and rear seat that are different.
You can tell by the little arrows and the color of paint that these were used in a suburban. The middle seat will have a cut-out for the wheel well on one side only.
