Original Magnum 500s or Magnum no hundreds?

[shelbymann1970]

So factory wheels like Magnums and KH steel wheels have the width stamped in the rim like this 68 Shelby steel wheel(6 inch)  12 29 date and "6" next to 29 right of valve stem. Chrome Magnums on the back side (7.0)

They are stamped though location of that stamping and other codes depends on year they were made (both Motorwheels - Magnums and KH). Some are visible while other years are not once the tire is installed. Examples of those have been posted in a number of prior threads

Thanks Jeff. I didn't want to go into depth on that like the 69 Shelby wheels are stamped on the rim so with the tire on cannot be seen. I posted pics of some known original rims like the Magnum pic is the original rim on a 69 Boss 429 to be clear.