The Pure Oil Company of Ohio bought the Pure Oil Company of Minneapolis in 1921. Prior to the purchase, the PO Company of Minneapolis sold Energy gasoline. I believe that PO of Ohio rebranded Energy gasoline as Energee. Almost everything I've seen post the 1921 purchase is Energee, and not Energy.
Note "True Gasoline" on the sign. You typically only see this on the Minneapolis Company items. The fact that the sign is blue tells me that the sign was made for the PO Company of Ohio, after the rebranding of the Energy to Energee. Most likely in the early 1920's.
