I recently picked up a set of Rally II's for my '69 F/B vert correctly coded JK. My question is what do the other letters/numbers mean and where would I find this information for future reference? I have 2 wheels marked (when looking down on the rim) to the left of the valve stem "MI" over a "9" then "3" valve stem "5" "JK". The other 2 are marked, in the same order "MI" over "8" then "11" stem "20" "JK". Next ?, these came from an unmolested car and the owner claimed all "original", the trim rings are "bright chrome" in appearance, certainly not brushed, but I cannot find any parts numbers. Where would I look, or are there any stamped on them? Reference point, please. Last ?, the centers certainly appear as old as the wheel, particularly when looking from the back..they are however completely faded to a "clear" appearance. They had color at one time as there are traces visible, is there any way to restore them or is it worth it? Thanks ahead of time for any help. Jeff