Rallye Wheel Inspection Marks?

While prepping my Rallyes for resto, I found some markings on the back that I hadn’t noticed before. Anyone ever seen this type of marking? I expect they’re factory or manufacturing markings, but I guess you can’t rule out some one doing something at a tire shop. These are original paint, matched date of 5/5/70.

Couple other anal tidbits. There’s some red paint residue from the drum paint on one rim and one still has the white dot valve stem cap. Pretty cool..

Thanks for the pics Floyd.What size are they and what's your restoration procedure?

I have seen this before on original wheels. I sure it was based on an audit check as the product was delivered from the sequencing equipment just prior to installation on the vehicle.