I have two porcelain Continental Oil Company Conoco sign. They are mounted together to make one front and back sign. Dimensions are 17'10" long and 16" tall. It comes with the mounting brackets to mount this to roof of a building. With the mounting brackets the sign measures 26" from bottom to top. I have not been able to find out very much information about this sign. This leads me to believe that it is a rare sign. I have found one other sign online that looks like this one. The information that was posted with it was that it was circa 1940's. I am not 100% sure on that. The other one I saw was one sign and sold for ~$4,000. This is two signs with mounting brackets. Make me an offer.
I am located in Arkansas. You can contact me either via email firstname.lastname@example.org or call/text me 479-857-2023.
Pictures can be seen here: https://plus.google.com/u/0/photos/113438417224080874884/albums/5740712182337340993