Thanks to the people that helped with my last question. I also acquired a Signal Gasoline porcelain sign that is 11.75" diameter. The back is solid white. My other sign is a Studebaker Authorized Service porcelain that is 11.25" diameter. The back to this one is gray colored. I have pictures if someone wants me to email to them. jmduffy@ticon.net Does anyone know if these signs are repros?