Thanks for the updates. I will go through some old documents with splots. I think I have late 60ies!
When I continued in the Wheel department I had my luck today. A ruyst free rim with the date code M4. That indicates December of 1964. So I started to glass bead the darn thing but my glass is almost like baking powder!!!
Tomorrow I will get a new bag of glass to continue glass beading. I think this rim will do good with right primer and the right black face. Then I will add the 7.00 x 13 white wall even if it's used. I I ran into another tires I can always change.