They could have still been selling their unbranded premium (if it was a good seller or well known in that market) along with Pure branded fuels. Some of the times you would have the main pumps dispensing the major brand and a local unbranded pump to the side. But that's just a guess

Looking for any Alabama based globes and advertising such as Coastal, Rebel, Interstate Oil, Foster Oil (supertane), Mutual, Oil Well, etc...