well, it is a paper can, so not as old as the metal ones. Maybe 70's ? Would I use it? Probably would mix it with some modern oil in my model A. Some people still use nothing but non detergent in their model A's.
I'm thinking 1970's or early 1980's as sometime after that the oil suppliers went to plastic bottles. I have a couple of cans of QS SAE 20 that are metal and I do know that they are from the mid 60's which is when I bought them.