Rim width stamped on all Mopar factory black steel wheels?

My five minute project of searching for the rim width size of a fourteen inch wheel from a 1972 Satellite Sebring Plus is turning into an all day affair. Am I looking for something that does not exist? So far I found "M32" and "B" stamped on the backside of the wheel between the mounting holes. Then on the frontside near the valve stem I find "M32" "2" "valve stem" "29" "pentastar". Behind the valve stem is "3580050", which comes up "not found" on a parts number search. Anyway, all I am looking for is the rim width, isn't this info stamped on all steel wheels? So far I have degreased the wheel, but have not started to sand off the surface rust yet and don't really want to if not necessary. Thank you.

Inside?

yea, it's inside the rim, take off tire

That rim is likely 14 X 5 1/2". If it was 14 X 6" the flat spacing at the joint from the rim to the wheel center would be deeper.