I have seen a similar but different base sort of like this. It was repainted green with the lettering highlited. It was being used as an inside lite pole in a collection. Do not recall ever seeing a picture of an original one being used. Would look good in my collection.
Not sure if this is applicable. I have a Square base for a pole embossed with the Conoco triangle logo (they are somewhat common) and it was used as a flag pole holder.
Collect small Oklahoma Oil Co.'s 1920's-1940's. Barnsdall, Cushing, Eason, Marland, etc.