How to identify Magnum 500's

[J.Bond]

Stopped by a an associates home yesterday to pick up a few parts. I guess he was in a fall clean up mode, the original deal was to pick up a spare 440 block and crank, needless to say when I arrived, there was quite a pile on the shop floor. And on top was a pair of 500's. Does the part number change thru the years, like is a 67 rim numbered like a 69rim?

[maxwellwedge]

Part numbers didn't start appearing on rims until the 1970 model year. Before that - date codes only. 

[ODZKing]

James,
Mopar did not manufacture the Mag 5's or the Mag 5 Road Wheels.  I believe the company name was Motor Wheel Corporation.
Having said that there is a date code on most if not all the wheels but not necessilarly a part number.
Bill440RT explained how to decode a while back in a thread when he was looking for a specifc date, but I can't find it now.
There is a M or an H then a single digit that would designate the year of manufacture.
Long story short, if he doesn't see this thread, PM him and I'm sure he can explain it.

[6bblgt]

Motor Wheel Corp. made the 5-spoke "mag" wheels (all chrome & trim ring versions) for Chrysler, Ford, GM, AMC & the aftermarket.

Find the stampings on the wheel, some are stamped on the rearward lip & some near the valve stem -  post pics or numbers and someone will help you figure out what you have.