Chris, Its the "Tucker Tire Company" at Dyersburg Tn. From Google you can check the Ebay store and I think the ones I got are listed as 260338091232 from their ebay listing now.
I remember the day they arrived I was "shocked" as to the tread! One can go down the highway for ever and never wear them down. They do ride a little rough on hard ground, even without much air in them. But love them working in the woods or fields.