How old is this CO-OP Traction Drive Tire?

[BossofBBQ]

I have a CO-OP Traction Drive tire on my New Idea 12A manure spreader. It looks pretty old, but doesn’t have a date code. Just out of curiosity, I was wondering if anyone knew the approximate age of this tire type/ tread pattern. Attached are some photos. Thoughts? Thanks in advance y’all, TBN is awesome!

 

[oldnslo]

If my memory is correct the 12A was produced in the early 50’s but not sure when Co-op went out of business but would guess in the 70’s.

 

[BossofBBQ]

It looks pretty old, but still holds air just fine. It has an interesting tread pattern, I've never seen anything quite like it. The tire on the other side has been replaced with a more modern tread pattern, but that one has weather checking too. According to my owners manual, the 12A was produced from 1948-1955. I don't know how many they sold, but this one's still doing a good job 70+ years later.