Searching, I couldn't find anything specific on the markings found on Magnum 500 wheels. Some threads have photos that have expired, etc. Please forgive me if I missed something.
I'll try to attach some photos of the wheels from my Boss 429. I'm thinking that they could be original since the car was built 9/26/69 per my Marti report. Guessing that 9 18 is month and day and the number 9 inside the capitol "D" is 4Th quarter of 1969? There is also a 4 inside a circle. M4 over the number 9 is also stamped on the lip. All 4 wheels have the same marks. I'm about to replace the tires with some no size Goodyears, anything I should look for on the inside of the wheels?
I also have some codes on the tires, Polyglas with size, 2 with MBUD DLA012 1 with CBNCJBDL and 1 with AFNBJBC1. Probably should start a new thread on those, I'm almost certain they are not original.
Thanks,
Charlie.