Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums General Petroliana Discussion American Gas Norman Rockwell banner

I just bought this banner and recieved it yesterday. I was trying to research its age, but I had some difficulty finding the years "American Gas" was actually in operation, as I am assuming it was just another spin from Standard. Can anyone tell me the dates of American Gas and one step further can anyone date this banner for me? Thanks!!