I picked up a set of original 14 x 6 Rally Wheels for my '67 today, and got an extra 15 x 6 in the deal. On the outer rim (would be inside the tire if a tire was on it) it says 15 x 6 JK. The code by the valve stem appears to be YS, but the S is sort of faint compared to the Y. The date code on the other side of the valve stem is K19 10.
Also, it's a 5x4-1/2 bolt pattern, and iit seems to have an odd backspacing of 3-1/2".
Does anyone know what this could be?
I found a reference to a YS wheel on the net, but can't find anything that says what application it was for.